213966469 has 4 divisors (see below), whose sum is σ = 214075296. Its totient is φ = 213857644.

The previous prime is 213966457. The next prime is 213966479. The reversal of 213966469 is 964669312.

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 213966469 - 2¹⁵ = 213933701 is a prime.

It is a super-2 number, since 2×213966469² = 91563299712655922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213966439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51409 + ... + 55414.

It is an arithmetic number, because the mean of its divisors is an integer number (53518824).

Almost surely, 2^213966469 is an apocalyptic number.

It is an amenable number.

213966469 is a deficient number, since it is larger than the sum of its proper divisors (108827).

213966469 is a wasteful number, since it uses less digits than its factorization.

213966469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108826.

The product of its digits is 419904, while the sum is 46.

The square root of 213966469 is about 14627.5927274449. The cubic root of 213966469 is about 598.1111609775. Note that the first 4 decimals are identical.

The spelling of 213966469 in words is "two hundred thirteen million, nine hundred sixty-six thousand, four hundred sixty-nine".