870213497 has 2 divisors, whose sum is σ = 870213498. Its totient is φ = 870213496.

The previous prime is 870213437. The next prime is 870213517. The reversal of 870213497 is 794312078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490002496 + 380211001 = 22136^2 + 19499^2 .

It is a cyclic number.

It is not a de Polignac number, because 870213497 - 2⁸ = 870213241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (870213437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435106748 + 435106749.

It is an arithmetic number, because the mean of its divisors is an integer number (435106749).

Almost surely, 2^870213497 is an apocalyptic number.

It is an amenable number.

870213497 is a deficient number, since it is larger than the sum of its proper divisors (1).

870213497 is an equidigital number, since it uses as much as digits as its factorization.

870213497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 870213497 is about 29499.3812985968. The cubic root of 870213497 is about 954.7183537576.

The spelling of 870213497 in words is "eight hundred seventy million, two hundred thirteen thousand, four hundred ninety-seven".