97174720157 has 2 divisors, whose sum is σ = 97174720158. Its totient is φ = 97174720156.

The previous prime is 97174720129. The next prime is 97174720169. The reversal of 97174720157 is 75102747179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83871635236 + 13303084921 = 289606^2 + 115339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97174720157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97174720457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48587360078 + 48587360079.

It is an arithmetic number, because the mean of its divisors is an integer number (48587360079).

Almost surely, 2^97174720157 is an apocalyptic number.

It is an amenable number.

97174720157 is a deficient number, since it is larger than the sum of its proper divisors (1).

97174720157 is an equidigital number, since it uses as much as digits as its factorization.

97174720157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864360, while the sum is 50.

The spelling of 97174720157 in words is "ninety-seven billion, one hundred seventy-four million, seven hundred twenty thousand, one hundred fifty-seven".