70699609 has 4 divisors (see below), whose sum is σ = 72203904. Its totient is φ = 69195316.

The previous prime is 70699579. The next prime is 70699613. The reversal of 70699609 is 90699607.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90699607 = 17 ⋅5335271.

It is a cyclic number.

It is not a de Polignac number, because 70699609 - 2²⁵ = 37145177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70699639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752077 + ... + 752170.

It is an arithmetic number, because the mean of its divisors is an integer number (18050976).

Almost surely, 2^70699609 is an apocalyptic number.

It is an amenable number.

70699609 is a deficient number, since it is larger than the sum of its proper divisors (1504295).

70699609 is a wasteful number, since it uses less digits than its factorization.

70699609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504294.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 70699609 is about 8408.3059530443. The cubic root of 70699609 is about 413.4969755411.

The spelling of 70699609 in words is "seventy million, six hundred ninety-nine thousand, six hundred nine".