1930401631 has 2 divisors, whose sum is σ = 1930401632. Its totient is φ = 1930401630.

The previous prime is 1930401619. The next prime is 1930401727. The reversal of 1930401631 is 1361040391.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1930401631 - 2²⁷ = 1796183903 is a prime.

It is a super-2 number, since 2×1930401631² = 7452900913934920322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1930401631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1930401611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 965200815 + 965200816.

It is an arithmetic number, because the mean of its divisors is an integer number (965200816).

Almost surely, 2^1930401631 is an apocalyptic number.

1930401631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1930401631 is an equidigital number, since it uses as much as digits as its factorization.

1930401631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1930401631 is about 43936.3361126073. The cubic root of 1930401631 is about 1245.1334256986.

The spelling of 1930401631 in words is "one billion, nine hundred thirty million, four hundred one thousand, six hundred thirty-one".