1612314581 has 2 divisors, whose sum is σ = 1612314582. Its totient is φ = 1612314580.

The previous prime is 1612314577. The next prime is 1612314601. The reversal of 1612314581 is 1854132161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1167315556 + 444999025 = 34166^2 + 21095^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612314581 - 2² = 1612314577 is a prime.

It is a super-2 number, since 2×1612314581² = 5199116616210411122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1612314551) 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, 806157290 + 806157291.

It is an arithmetic number, because the mean of its divisors is an integer number (806157291).

Almost surely, 2^1612314581 is an apocalyptic number.

It is an amenable number.

1612314581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612314581 is an equidigital number, since it uses as much as digits as its factorization.

1612314581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 1612314581 is about 40153.6372076055. The cubic root of 1612314581 is about 1172.6001008065.

The spelling of 1612314581 in words is "one billion, six hundred twelve million, three hundred fourteen thousand, five hundred eighty-one".