623930491 has 4 divisors (see below), whose sum is σ = 624074152. Its totient is φ = 623786832.

The previous prime is 623930479. The next prime is 623930501. The reversal of 623930491 is 194039326.

623930491 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 623930491 - 2¹¹ = 623928443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 623930491.

It is not an unprimeable number, because it can be changed into a prime (623930401) 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, 65106 + ... + 74071.

It is an arithmetic number, because the mean of its divisors is an integer number (156018538).

Almost surely, 2^623930491 is an apocalyptic number.

623930491 is a deficient number, since it is larger than the sum of its proper divisors (143661).

623930491 is a wasteful number, since it uses less digits than its factorization.

623930491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143660.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 623930491 is about 24978.6006613661. The cubic root of 623930491 is about 854.5000056494.

The spelling of 623930491 in words is "six hundred twenty-three million, nine hundred thirty thousand, four hundred ninety-one".