709870647 has 16 divisors (see below), whose sum is σ = 997228160. Its totient is φ = 447926112.

The previous prime is 709870631. The next prime is 709870663. The reversal of 709870647 is 746078907.

It is an interprime number because it is at equal distance from previous prime (709870631) and next prime (709870663).

It is not a de Polignac number, because 709870647 - 2⁴ = 709870631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 709870596 and 709870605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709870607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64008 + ... + 74274.

It is an arithmetic number, because the mean of its divisors is an integer number (62326760).

Almost surely, 2^709870647 is an apocalyptic number.

709870647 is a deficient number, since it is larger than the sum of its proper divisors (287357513).

709870647 is a wasteful number, since it uses less digits than its factorization.

709870647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11502.

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 709870647 is about 26643.3978125914. The cubic root of 709870647 is about 892.0579599807.

The spelling of 709870647 in words is "seven hundred nine million, eight hundred seventy thousand, six hundred forty-seven".