401025389 has 2 divisors, whose sum is σ = 401025390. Its totient is φ = 401025388.

The previous prime is 401025379. The next prime is 401025403. The reversal of 401025389 is 983520104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340107364 + 60918025 = 18442^2 + 7805^2 .

It is a cyclic number.

It is not a de Polignac number, because 401025389 - 2⁸ = 401025133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401025379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200512694 + 200512695.

It is an arithmetic number, because the mean of its divisors is an integer number (200512695).

Almost surely, 2^401025389 is an apocalyptic number.

It is an amenable number.

401025389 is a deficient number, since it is larger than the sum of its proper divisors (1).

401025389 is an equidigital number, since it uses as much as digits as its factorization.

401025389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 401025389 is about 20025.6183175452. The cubic root of 401025389 is about 737.4353567395.

The spelling of 401025389 in words is "four hundred one million, twenty-five thousand, three hundred eighty-nine".