123570157 has 2 divisors, whose sum is σ = 123570158. Its totient is φ = 123570156.

The previous prime is 123570103. The next prime is 123570169. The reversal of 123570157 is 751075321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122899396 + 670761 = 11086^2 + 819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123570157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123570257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61785078 + 61785079.

It is an arithmetic number, because the mean of its divisors is an integer number (61785079).

Almost surely, 2^123570157 is an apocalyptic number.

It is an amenable number.

123570157 is a deficient number, since it is larger than the sum of its proper divisors (1).

123570157 is an equidigital number, since it uses as much as digits as its factorization.

123570157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 123570157 is about 11116.2114499500. The cubic root of 123570157 is about 498.0862269578.

The spelling of 123570157 in words is "one hundred twenty-three million, five hundred seventy thousand, one hundred fifty-seven".