469 has 4 divisors (see below), whose sum is σ = 544. Its totient is φ = 396.

The previous prime is 467. The next prime is 479. The reversal of 469 is 964.

Multipling 469 by its sum of digits (19), we get a triangular number (8911 = T_{133}).

Subtracting from 469 its product of digits (216), we obtain a triangular number (253 = T_{22}).

It can be divided in two parts, 46 and 9, that multiplied together give a palindrome (414).

It is a happy number.

469 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 469 - 2^{1} = 467 is a prime.

It is a super-2 number, since 2×469^{2} = 439922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 5, base 10 and base 14.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27 + ... + 40.

It is an arithmetic number, because the mean of its divisors is an integer number (136).

469 is the 14-th heptagonal number.

469 is the 13-th hex number.

It is an amenable number.

469 is a deficient number, since it is larger than the sum of its proper divisors (75).

469 is an equidigital number, since it uses as much as digits as its factorization.

469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74.

The product of its digits is 216, while the sum is 19.

The square root of 469 is about 21.6564078277. The cubic root of 469 is about 7.7694620117.

The spelling of 469 in words is "four hundred sixty-nine", and thus it is an aban number.

• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.057 sec. • engine limits •