401624999 has 2 divisors, whose sum is σ = 401625000. Its totient is φ = 401624998.

The previous prime is 401624989. The next prime is 401625013. The reversal of 401624999 is 999426104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401624999 - 2²⁴ = 384847783 is a prime.

It is a super-2 number, since 2×401624999² = 322605279643500002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401624959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200812499 + 200812500.

It is an arithmetic number, because the mean of its divisors is an integer number (200812500).

Almost surely, 2^401624999 is an apocalyptic number.

401624999 is a deficient number, since it is larger than the sum of its proper divisors (1).

401624999 is an equidigital number, since it uses as much as digits as its factorization.

401624999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 401624999 is about 20040.5837988817. The cubic root of 401624999 is about 737.8027095565.

The spelling of 401624999 in words is "four hundred one million, six hundred twenty-four thousand, nine hundred ninety-nine".