70500709 has 4 divisors (see below), whose sum is σ = 70518604. Its totient is φ = 70482816.

The previous prime is 70500701. The next prime is 70500713. The reversal of 70500709 is 90700507.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90700507 = 1297 ⋅69931.

It can be written as a sum of positive squares in 2 ways, for example, as 30140100 + 40360609 = 5490^2 + 6353^2 .

It is a cyclic number.

It is not a de Polignac number, because 70500709 - 2³ = 70500701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70500701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162 + ... + 11875.

It is an arithmetic number, because the mean of its divisors is an integer number (17629651).

Almost surely, 2^70500709 is an apocalyptic number.

It is an amenable number.

70500709 is a deficient number, since it is larger than the sum of its proper divisors (17895).

70500709 is a wasteful number, since it uses less digits than its factorization.

70500709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17894.

The product of its (nonzero) digits is 2205, while the sum is 28.

The square root of 70500709 is about 8396.4700321028. The cubic root of 70500709 is about 413.1088461164.

The spelling of 70500709 in words is "seventy million, five hundred thousand, seven hundred nine".