400125589 has 2 divisors, whose sum is σ = 400125590. Its totient is φ = 400125588.

The previous prime is 400125571. The next prime is 400125637. The reversal of 400125589 is 985521004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344399364 + 55726225 = 18558^2 + 7465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400125589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400125529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200062794 + 200062795.

It is an arithmetic number, because the mean of its divisors is an integer number (200062795).

Almost surely, 2^400125589 is an apocalyptic number.

It is an amenable number.

400125589 is a deficient number, since it is larger than the sum of its proper divisors (1).

400125589 is an equidigital number, since it uses as much as digits as its factorization.

400125589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 400125589 is about 20003.1394785919. The cubic root of 400125589 is about 736.8834039644.

The spelling of 400125589 in words is "four hundred million, one hundred twenty-five thousand, five hundred eighty-nine".