157391089 has 2 divisors, whose sum is σ = 157391090. Its totient is φ = 157391088.

The previous prime is 157391063. The next prime is 157391119. The reversal of 157391089 is 980193751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156375025 + 1016064 = 12505^2 + 1008^2 .

It is a cyclic number.

It is not a de Polignac number, because 157391089 - 2⁹ = 157390577 is a prime.

It is not a weakly prime, because it can be changed into another prime (157391029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78695544 + 78695545.

It is an arithmetic number, because the mean of its divisors is an integer number (78695545).

Almost surely, 2^157391089 is an apocalyptic number.

It is an amenable number.

157391089 is a deficient number, since it is larger than the sum of its proper divisors (1).

157391089 is an equidigital number, since it uses as much as digits as its factorization.

157391089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 157391089 is about 12545.5605295260. The cubic root of 157391089 is about 539.9166412251.

The spelling of 157391089 in words is "one hundred fifty-seven million, three hundred ninety-one thousand, eighty-nine".