870740081 has 2 divisors, whose sum is σ = 870740082. Its totient is φ = 870740080.

The previous prime is 870740077. The next prime is 870740093. The reversal of 870740081 is 180047078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 564490081 + 306250000 = 23759^2 + 17500^2 .

It is a cyclic number.

It is not a de Polignac number, because 870740081 - 2² = 870740077 is a prime.

It is a super-2 number, since 2×870740081² = 1516376577319773122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (870740011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435370040 + 435370041.

It is an arithmetic number, because the mean of its divisors is an integer number (435370041).

Almost surely, 2^870740081 is an apocalyptic number.

It is an amenable number.

870740081 is a deficient number, since it is larger than the sum of its proper divisors (1).

870740081 is an equidigital number, since it uses as much as digits as its factorization.

870740081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 870740081 is about 29508.3052885116. The cubic root of 870740081 is about 954.9108881335.

The spelling of 870740081 in words is "eight hundred seventy million, seven hundred forty thousand, eighty-one".