870829331 has 2 divisors, whose sum is σ = 870829332. Its totient is φ = 870829330.

The previous prime is 870829327. The next prime is 870829343. The reversal of 870829331 is 133928078.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 870829331 - 2² = 870829327 is a prime.

It is a super-2 number, since 2×870829331² = 1516687447459815122, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (870829361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435414665 + 435414666.

It is an arithmetic number, because the mean of its divisors is an integer number (435414666).

Almost surely, 2^870829331 is an apocalyptic number.

870829331 is a deficient number, since it is larger than the sum of its proper divisors (1).

870829331 is an equidigital number, since it uses as much as digits as its factorization.

870829331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 870829331 is about 29509.8175358642. The cubic root of 870829331 is about 954.9435128271.

The spelling of 870829331 in words is "eight hundred seventy million, eight hundred twenty-nine thousand, three hundred thirty-one".