400959023 has 4 divisors (see below), whose sum is σ = 418392048. Its totient is φ = 383526000.

The previous prime is 400959019. The next prime is 400959037. The reversal of 400959023 is 320959004.

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 400959023 - 2² = 400959019 is a prime.

It is a super-2 number, since 2×400959023² = 321536276250229058, 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 (400959323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8716478 + ... + 8716523.

It is an arithmetic number, because the mean of its divisors is an integer number (104598012).

Almost surely, 2^400959023 is an apocalyptic number.

400959023 is a deficient number, since it is larger than the sum of its proper divisors (17433025).

400959023 is a wasteful number, since it uses less digits than its factorization.

400959023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17433024.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 400959023 is about 20023.9612214966. The cubic root of 400959023 is about 737.3946749138.

The spelling of 400959023 in words is "four hundred million, nine hundred fifty-nine thousand, twenty-three".