423913623 has 32 divisors (see below), whose sum is σ = 676823040. Its totient is φ = 230899680.

The previous prime is 423913601. The next prime is 423913661. The reversal of 423913623 is 326319324.

It is not a de Polignac number, because 423913623 - 2¹⁸ = 423651479 is a prime.

It is a super-2 number, since 2×423913623² = 359405519529972258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423913673) 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 31 ways as a sum of consecutive naturals, for example, 38758 + ... + 48476.

It is an arithmetic number, because the mean of its divisors is an integer number (21150720).

Almost surely, 2^423913623 is an apocalyptic number.

423913623 is a deficient number, since it is larger than the sum of its proper divisors (252909417).

423913623 is a wasteful number, since it uses less digits than its factorization.

423913623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9827.

The product of its digits is 23328, while the sum is 33.

The square root of 423913623 is about 20589.1627561686. The cubic root of 423913623 is about 751.2061321760.

The spelling of 423913623 in words is "four hundred twenty-three million, nine hundred thirteen thousand, six hundred twenty-three".