870157139 has 2 divisors, whose sum is σ = 870157140. Its totient is φ = 870157138.

The previous prime is 870157129. The next prime is 870157181. The reversal of 870157139 is 931751078.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-870157139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 870157096 and 870157105.

It is not a weakly prime, because it can be changed into another prime (870157129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435078569 + 435078570.

It is an arithmetic number, because the mean of its divisors is an integer number (435078570).

Almost surely, 2^870157139 is an apocalyptic number.

870157139 is a deficient number, since it is larger than the sum of its proper divisors (1).

870157139 is an equidigital number, since it uses as much as digits as its factorization.

870157139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 41.

The square root of 870157139 is about 29498.4260427569. The cubic root of 870157139 is about 954.6977430382.

The spelling of 870157139 in words is "eight hundred seventy million, one hundred fifty-seven thousand, one hundred thirty-nine".