83161657 has 2 divisors, whose sum is σ = 83161658. Its totient is φ = 83161656.

The previous prime is 83161643. The next prime is 83161667. The reversal of 83161657 is 75616138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58201641 + 24960016 = 7629^2 + 4996^2 .

It is a cyclic number.

It is not a de Polignac number, because 83161657 - 2¹⁵ = 83128889 is a prime.

It is a super-2 number, since 2×83161657² = 13831722389971298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83161627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41580828 + 41580829.

It is an arithmetic number, because the mean of its divisors is an integer number (41580829).

Almost surely, 2^83161657 is an apocalyptic number.

It is an amenable number.

83161657 is a deficient number, since it is larger than the sum of its proper divisors (1).

83161657 is an equidigital number, since it uses as much as digits as its factorization.

83161657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 83161657 is about 9119.3013438530. The cubic root of 83161657 is about 436.4900799753.

The spelling of 83161657 in words is "eighty-three million, one hundred sixty-one thousand, six hundred fifty-seven".