623494679 has 4 divisors (see below), whose sum is σ = 632035776. Its totient is φ = 614953584.

The previous prime is 623494643. The next prime is 623494681. The reversal of 623494679 is 976494326.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623494679 is a prime.

It is a super-2 number, since 2×623494679² = 777491229482626082, 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 (623494609) 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, 4270439 + ... + 4270584.

It is an arithmetic number, because the mean of its divisors is an integer number (158008944).

Almost surely, 2^623494679 is an apocalyptic number.

623494679 is a deficient number, since it is larger than the sum of its proper divisors (8541097).

623494679 is an equidigital number, since it uses as much as digits as its factorization.

623494679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8541096.

The product of its digits is 1959552, while the sum is 50.

The square root of 623494679 is about 24969.8754302059. The cubic root of 623494679 is about 854.3010047979.

The spelling of 623494679 in words is "six hundred twenty-three million, four hundred ninety-four thousand, six hundred seventy-nine".