83657897 has 2 divisors, whose sum is σ = 83657898. Its totient is φ = 83657896.

The previous prime is 83657879. The next prime is 83657911. The reversal of 83657897 is 79875638.

Together with previous prime (83657879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62900761 + 20757136 = 7931^2 + 4556^2 .

It is a cyclic number.

It is not a de Polignac number, because 83657897 - 2⁸ = 83657641 is a prime.

It is not a weakly prime, because it can be changed into another prime (83653897) 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, 41828948 + 41828949.

It is an arithmetic number, because the mean of its divisors is an integer number (41828949).

Almost surely, 2^83657897 is an apocalyptic number.

It is an amenable number.

83657897 is a deficient number, since it is larger than the sum of its proper divisors (1).

83657897 is an equidigital number, since it uses as much as digits as its factorization.

83657897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 53.

The square root of 83657897 is about 9146.4691001501. The cubic root of 83657897 is about 437.3565627198.

The spelling of 83657897 in words is "eighty-three million, six hundred fifty-seven thousand, eight hundred ninety-seven".