870808291 has 2 divisors, whose sum is σ = 870808292. Its totient is φ = 870808290.

The previous prime is 870808277. The next prime is 870808297. The reversal of 870808291 is 192808078.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 870808291 - 2¹⁹ = 870284003 is a prime.

It is not a weakly prime, because it can be changed into another prime (870808297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435404145 + 435404146.

It is an arithmetic number, because the mean of its divisors is an integer number (435404146).

Almost surely, 2^870808291 is an apocalyptic number.

870808291 is a deficient number, since it is larger than the sum of its proper divisors (1).

870808291 is an equidigital number, since it uses as much as digits as its factorization.

870808291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 870808291 is about 29509.4610421810. The cubic root of 870808291 is about 954.9358220078.

The spelling of 870808291 in words is "eight hundred seventy million, eight hundred eight thousand, two hundred ninety-one".