623045431 has 4 divisors (see below), whose sum is σ = 625011192. Its totient is φ = 621079672.

The previous prime is 623045419. The next prime is 623045441. The reversal of 623045431 is 134540326.

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 623045431 - 2⁷ = 623045303 is a prime.

It is a super-2 number, since 2×623045431² = 776371218179951522, which contains 22 as substring.

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 623045431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623045441) 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, 982405 + ... + 983038.

It is an arithmetic number, because the mean of its divisors is an integer number (156252798).

Almost surely, 2^623045431 is an apocalyptic number.

623045431 is a deficient number, since it is larger than the sum of its proper divisors (1965761).

623045431 is a wasteful number, since it uses less digits than its factorization.

623045431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965760.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 623045431 is about 24960.8780093970. The cubic root of 623045431 is about 854.0957717002.

Adding to 623045431 its reverse (134540326), we get a palindrome (757585757).

The spelling of 623045431 in words is "six hundred twenty-three million, forty-five thousand, four hundred thirty-one".