401503889 has 2 divisors, whose sum is σ = 401503890. Its totient is φ = 401503888.

The previous prime is 401503859. The next prime is 401503903. The reversal of 401503889 is 988305104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 354004225 + 47499664 = 18815^2 + 6892^2 .

It is a cyclic number.

It is not a de Polignac number, because 401503889 - 2⁸ = 401503633 is a prime.

It is a super-2 number, since 2×401503889² = 322410745764248642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401503819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200751944 + 200751945.

It is an arithmetic number, because the mean of its divisors is an integer number (200751945).

Almost surely, 2^401503889 is an apocalyptic number.

It is an amenable number.

401503889 is a deficient number, since it is larger than the sum of its proper divisors (1).

401503889 is an equidigital number, since it uses as much as digits as its factorization.

401503889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 401503889 is about 20037.5619524931. The cubic root of 401503889 is about 737.7285406430.

The spelling of 401503889 in words is "four hundred one million, five hundred three thousand, eight hundred eighty-nine".