179920157 has 2 divisors, whose sum is σ = 179920158. Its totient is φ = 179920156.

The previous prime is 179920151. The next prime is 179920201. The reversal of 179920157 is 751029971.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144624676 + 35295481 = 12026^2 + 5941^2 .

It is a cyclic number.

It is not a de Polignac number, because 179920157 - 2¹⁶ = 179854621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (179920151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 89960078 + 89960079.

It is an arithmetic number, because the mean of its divisors is an integer number (89960079).

Almost surely, 2^179920157 is an apocalyptic number.

It is an amenable number.

179920157 is a deficient number, since it is larger than the sum of its proper divisors (1).

179920157 is an equidigital number, since it uses as much as digits as its factorization.

179920157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 41.

The square root of 179920157 is about 13413.4319620297. The cubic root of 179920157 is about 564.5381214934.

The spelling of 179920157 in words is "one hundred seventy-nine million, nine hundred twenty thousand, one hundred fifty-seven".