403907612981 has 2 divisors, whose sum is σ = 403907612982. Its totient is φ = 403907612980.

The previous prime is 403907612971. The next prime is 403907613061. The reversal of 403907612981 is 189216709304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205050480625 + 198857132356 = 452825^2 + 445934^2 .

It is a cyclic number.

It is not a de Polignac number, because 403907612981 - 2²⁶ = 403840504117 is a prime.

It is a super-2 number, since 2×403907612981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403907612971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201953806490 + 201953806491.

It is an arithmetic number, because the mean of its divisors is an integer number (201953806491).

Almost surely, 2^403907612981 is an apocalyptic number.

It is an amenable number.

403907612981 is a deficient number, since it is larger than the sum of its proper divisors (1).

403907612981 is an equidigital number, since it uses as much as digits as its factorization.

403907612981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 403907612981 in words is "four hundred three billion, nine hundred seven million, six hundred twelve thousand, nine hundred eighty-one".