870084961 has 2 divisors, whose sum is σ = 870084962. Its totient is φ = 870084960.

The previous prime is 870084959. The next prime is 870084983. The reversal of 870084961 is 169480078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 867891600 + 2193361 = 29460^2 + 1481^2 .

It is a cyclic number.

It is not a de Polignac number, because 870084961 - 2¹ = 870084959 is a prime.

Together with 870084959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (870084991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435042480 + 435042481.

It is an arithmetic number, because the mean of its divisors is an integer number (435042481).

Almost surely, 2^870084961 is an apocalyptic number.

It is an amenable number.

870084961 is a deficient number, since it is larger than the sum of its proper divisors (1).

870084961 is an equidigital number, since it uses as much as digits as its factorization.

870084961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 870084961 is about 29497.2025961785. The cubic root of 870084961 is about 954.6713454770.

The spelling of 870084961 in words is "eight hundred seventy million, eighty-four thousand, nine hundred sixty-one".