1890315631 has 2 divisors, whose sum is σ = 1890315632. Its totient is φ = 1890315630.

The previous prime is 1890315599. The next prime is 1890315659. The reversal of 1890315631 is 1365130981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1890315631 - 2⁵ = 1890315599 is a prime.

It is a super-2 number, since 2×1890315631² = 7146586369605856322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1890312631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945157815 + 945157816.

It is an arithmetic number, because the mean of its divisors is an integer number (945157816).

Almost surely, 2^1890315631 is an apocalyptic number.

1890315631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890315631 is an equidigital number, since it uses as much as digits as its factorization.

1890315631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 1890315631 is about 43477.7601883998. The cubic root of 1890315631 is about 1236.4544117942.

The spelling of 1890315631 in words is "one billion, eight hundred ninety million, three hundred fifteen thousand, six hundred thirty-one".