97561157 has 2 divisors, whose sum is σ = 97561158. Its totient is φ = 97561156.

The previous prime is 97561151. The next prime is 97561187. The reversal of 97561157 is 75116579.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73805281 + 23755876 = 8591^2 + 4874^2 .

It is a cyclic number.

It is not a de Polignac number, because 97561157 - 2⁴ = 97561141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97561151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48780578 + 48780579.

It is an arithmetic number, because the mean of its divisors is an integer number (48780579).

Almost surely, 2^97561157 is an apocalyptic number.

It is an amenable number.

97561157 is a deficient number, since it is larger than the sum of its proper divisors (1).

97561157 is an equidigital number, since it uses as much as digits as its factorization.

97561157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66150, while the sum is 41.

The square root of 97561157 is about 9877.3051486729. The cubic root of 97561157 is about 460.3544165284.

The spelling of 97561157 in words is "ninety-seven million, five hundred sixty-one thousand, one hundred fifty-seven".