870157129 has 2 divisors, whose sum is σ = 870157130. Its totient is φ = 870157128.

The previous prime is 870157103. The next prime is 870157139. The reversal of 870157129 is 921751078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 447237904 + 422919225 = 21148^2 + 20565^2 .

It is a cyclic number.

It is not a de Polignac number, because 870157129 - 2¹⁷ = 870026057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 870157091 and 870157100.

It is not a weakly prime, because it can be changed into another prime (870157139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435078564 + 435078565.

It is an arithmetic number, because the mean of its divisors is an integer number (435078565).

Almost surely, 2^870157129 is an apocalyptic number.

It is an amenable number.

870157129 is a deficient number, since it is larger than the sum of its proper divisors (1).

870157129 is an equidigital number, since it uses as much as digits as its factorization.

870157129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 870157129 is about 29498.4258732564. The cubic root of 870157129 is about 954.6977393810.

The spelling of 870157129 in words is "eight hundred seventy million, one hundred fifty-seven thousand, one hundred twenty-nine".