870346447 has 2 divisors, whose sum is σ = 870346448. Its totient is φ = 870346446.

The previous prime is 870346439. The next prime is 870346457. The reversal of 870346447 is 744643078.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 870346447 - 2³ = 870346439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870346417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435173223 + 435173224.

It is an arithmetic number, because the mean of its divisors is an integer number (435173224).

Almost surely, 2^870346447 is an apocalyptic number.

870346447 is a deficient number, since it is larger than the sum of its proper divisors (1).

870346447 is an equidigital number, since it uses as much as digits as its factorization.

870346447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 43.

The square root of 870346447 is about 29501.6346496258. The cubic root of 870346447 is about 954.7669714597.

The spelling of 870346447 in words is "eight hundred seventy million, three hundred forty-six thousand, four hundred forty-seven".