97555657 has 2 divisors, whose sum is σ = 97555658. Its totient is φ = 97555656.

The previous prime is 97555649. The next prime is 97555753. The reversal of 97555657 is 75655579.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50069776 + 47485881 = 7076^2 + 6891^2 .

It is a cyclic number.

It is not a de Polignac number, because 97555657 - 2³ = 97555649 is a prime.

It is a super-3 number, since 3×97555657³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 97555657.

It is not a weakly prime, because it can be changed into another prime (97555607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48777828 + 48777829.

It is an arithmetic number, because the mean of its divisors is an integer number (48777829).

Almost surely, 2^97555657 is an apocalyptic number.

It is an amenable number.

97555657 is a deficient number, since it is larger than the sum of its proper divisors (1).

97555657 is an equidigital number, since it uses as much as digits as its factorization.

97555657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1653750, while the sum is 49.

The square root of 97555657 is about 9877.0267287276. The cubic root of 97555657 is about 460.3457655551.

The spelling of 97555657 in words is "ninety-seven million, five hundred fifty-five thousand, six hundred fifty-seven".