669319 has 4 divisors (see below), whose sum is σ = 764944. Its totient is φ = 573696.

The previous prime is 669311. The next prime is 669329. The reversal of 669319 is 913966.

669319 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 669319 - 2³ = 669311 is a prime.

It is a super-2 number, since 2×669319² = 895975847522, which contains 22 as substring.

It is a Duffinian number.

669319 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669311) 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, 47802 + ... + 47815.

It is an arithmetic number, because the mean of its divisors is an integer number (191236).

2⁶⁶⁹³¹⁹ is an apocalyptic number.

669319 is a deficient number, since it is larger than the sum of its proper divisors (95625).

669319 is an equidigital number, since it uses as much as digits as its factorization.

669319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95624.

The product of its digits is 8748, while the sum is 34.

The square root of 669319 is about 818.1191844713. The cubic root of 669319 is about 87.4737445034.

The spelling of 669319 in words is "six hundred sixty-nine thousand, three hundred nineteen".