400625123 has 2 divisors, whose sum is σ = 400625124. Its totient is φ = 400625122.

The previous prime is 400625119. The next prime is 400625153. The reversal of 400625123 is 321526004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400625123 - 2² = 400625119 is a prime.

It is not a weakly prime, because it can be changed into another prime (400625153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200312561 + 200312562.

It is an arithmetic number, because the mean of its divisors is an integer number (200312562).

Almost surely, 2^400625123 is an apocalyptic number.

400625123 is a deficient number, since it is larger than the sum of its proper divisors (1).

400625123 is an equidigital number, since it uses as much as digits as its factorization.

400625123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 400625123 is about 20015.6219738483. The cubic root of 400625123 is about 737.1899287551.

The spelling of 400625123 in words is "four hundred million, six hundred twenty-five thousand, one hundred twenty-three".