1630993131 has 16 divisors (see below), whose sum is σ = 2416982400. Its totient is φ = 1087015464.

The previous prime is 1630993123. The next prime is 1630993163. The reversal of 1630993131 is 1313990361.

1630993131 is a `hidden beast` number, since 1 + 630 + 9 + 9 + 3 + 13 + 1 = 666.

It is not a de Polignac number, because 1630993131 - 2³ = 1630993123 is a prime.

It is a super-2 number, since 2×1630993131² = 5320277186738366322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1630993171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122940 + ... + 135558.

It is an arithmetic number, because the mean of its divisors is an integer number (151061400).

Almost surely, 2^1630993131 is an apocalyptic number.

1630993131 is a deficient number, since it is larger than the sum of its proper divisors (785989269).

1630993131 is a wasteful number, since it uses less digits than its factorization.

1630993131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17415 (or 17409 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 1630993131 is about 40385.5559699257. Note that the first 3 decimals coincide. The cubic root of 1630993131 is about 1177.1108893218.

The spelling of 1630993131 in words is "one billion, six hundred thirty million, nine hundred ninety-three thousand, one hundred thirty-one".