1616161931 has 2 divisors, whose sum is σ = 1616161932. Its totient is φ = 1616161930.

The previous prime is 1616161927. The next prime is 1616161957. The reversal of 1616161931 is 1391616161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1616161931 - 2² = 1616161927 is a prime.

It is a super-2 number, since 2×1616161931² = 5223958774427297522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1616161891 and 1616161900.

It is not a weakly prime, because it can be changed into another prime (1616161991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808080965 + 808080966.

It is an arithmetic number, because the mean of its divisors is an integer number (808080966).

Almost surely, 2^1616161931 is an apocalyptic number.

1616161931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616161931 is an equidigital number, since it uses as much as digits as its factorization.

1616161931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 35.

The square root of 1616161931 is about 40201.5165261213. The cubic root of 1616161931 is about 1173.5320569290.

The spelling of 1616161931 in words is "one billion, six hundred sixteen million, one hundred sixty-one thousand, nine hundred thirty-one".