97180157 has 2 divisors, whose sum is σ = 97180158. Its totient is φ = 97180156.

The previous prime is 97180147. The next prime is 97180207. The reversal of 97180157 is 75108179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75099556 + 22080601 = 8666^2 + 4699^2 .

It is a cyclic number.

It is not a de Polignac number, because 97180157 - 2¹² = 97176061 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97180157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97180147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48590078 + 48590079.

It is an arithmetic number, because the mean of its divisors is an integer number (48590079).

Almost surely, 2^97180157 is an apocalyptic number.

It is an amenable number.

97180157 is a deficient number, since it is larger than the sum of its proper divisors (1).

97180157 is an equidigital number, since it uses as much as digits as its factorization.

97180157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 97180157 is about 9857.9996449584. Note that the first 3 decimals coincide. The cubic root of 97180157 is about 459.7543694918.

The spelling of 97180157 in words is "ninety-seven million, one hundred eighty thousand, one hundred fifty-seven".