157140989 has 2 divisors, whose sum is σ = 157140990. Its totient is φ = 157140988.

The previous prime is 157140983. The next prime is 157141007. The reversal of 157140989 is 989041751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127351225 + 29789764 = 11285^2 + 5458^2 .

It is a cyclic number.

It is not a de Polignac number, because 157140989 - 2⁸ = 157140733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157140983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78570494 + 78570495.

It is an arithmetic number, because the mean of its divisors is an integer number (78570495).

Almost surely, 2^157140989 is an apocalyptic number.

It is an amenable number.

157140989 is a deficient number, since it is larger than the sum of its proper divisors (1).

157140989 is an equidigital number, since it uses as much as digits as its factorization.

157140989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 157140989 is about 12535.5888972158. The cubic root of 157140989 is about 539.6305074078.

The spelling of 157140989 in words is "one hundred fifty-seven million, one hundred forty thousand, nine hundred eighty-nine".