83120657 has 2 divisors, whose sum is σ = 83120658. Its totient is φ = 83120656.

The previous prime is 83120651. The next prime is 83120683. The reversal of 83120657 is 75602138.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44568976 + 38551681 = 6676^2 + 6209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83120657 is a prime.

It is a super-2 number, since 2×83120657² = 13818087240223298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83120651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41560328 + 41560329.

It is an arithmetic number, because the mean of its divisors is an integer number (41560329).

Almost surely, 2^83120657 is an apocalyptic number.

It is an amenable number.

83120657 is a deficient number, since it is larger than the sum of its proper divisors (1).

83120657 is an equidigital number, since it uses as much as digits as its factorization.

83120657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 83120657 is about 9117.0530874839. The cubic root of 83120657 is about 436.4183360341.

The spelling of 83120657 in words is "eighty-three million, one hundred twenty thousand, six hundred fifty-seven".