70809609 has 8 divisors (see below), whose sum is σ = 101675392. Its totient is φ = 43575120.

The previous prime is 70809569. The next prime is 70809623. The reversal of 70809609 is 90690807.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70809609 - 2⁷ = 70809481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1815631 = 70809609 / (7 + 0 + 8 + 0 + 9 + 6 + 0 + 9).

It is not an unprimeable number, because it can be changed into a prime (70809659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907777 + ... + 907854.

It is an arithmetic number, because the mean of its divisors is an integer number (12709424).

Almost surely, 2^70809609 is an apocalyptic number.

It is an amenable number.

70809609 is a deficient number, since it is larger than the sum of its proper divisors (30865783).

70809609 is a wasteful number, since it uses less digits than its factorization.

70809609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815647.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 70809609 is about 8414.8445618443. The cubic root of 70809609 is about 413.7113147658.

The spelling of 70809609 in words is "seventy million, eight hundred nine thousand, six hundred nine".