870739 has 2 divisors, whose sum is σ = 870740. Its totient is φ = 870738.

The previous prime is 870731. The next prime is 870743. The reversal of 870739 is 937078.

870739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 870739 - 2³ = 870731 is a prime.

It is a super-2 number, since 2×870739² = 1516372812242, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (870731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435369 + 435370.

It is an arithmetic number, because the mean of its divisors is an integer number (435370).

2⁸⁷⁰⁷³⁹ is an apocalyptic number.

870739 is a deficient number, since it is larger than the sum of its proper divisors (1).

870739 is an equidigital number, since it uses as much as digits as its factorization.

870739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 870739 is about 933.1339668022. The cubic root of 870739 is about 95.4910492968.

The spelling of 870739 in words is "eight hundred seventy thousand, seven hundred thirty-nine".