97786457 has 2 divisors, whose sum is σ = 97786458. Its totient is φ = 97786456.

The previous prime is 97786441. The next prime is 97786511. The reversal of 97786457 is 75468779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76405081 + 21381376 = 8741^2 + 4624^2 .

It is a cyclic number.

It is not a de Polignac number, because 97786457 - 2⁴ = 97786441 is a prime.

It is a super-2 number, since 2×97786457² = 19124382345225698, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 97786399 and 97786408.

It is not a weakly prime, because it can be changed into another prime (97786417) 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, 48893228 + 48893229.

It is an arithmetic number, because the mean of its divisors is an integer number (48893229).

Almost surely, 2^97786457 is an apocalyptic number.

It is an amenable number.

97786457 is a deficient number, since it is larger than the sum of its proper divisors (1).

97786457 is an equidigital number, since it uses as much as digits as its factorization.

97786457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2963520, while the sum is 53.

The square root of 97786457 is about 9888.7035045045. The cubic root of 97786457 is about 460.7085127563.

The spelling of 97786457 in words is "ninety-seven million, seven hundred eighty-six thousand, four hundred fifty-seven".