70446809 has 4 divisors (see below), whose sum is σ = 71093220. Its totient is φ = 69800400.

The previous prime is 70446797. The next prime is 70446833. The reversal of 70446809 is 90864407.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55547209 + 14899600 = 7453^2 + 3860^2 .

It is a cyclic number.

It is not a de Polignac number, because 70446809 - 2²⁴ = 53669593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70446209) 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, 323042 + ... + 323259.

It is an arithmetic number, because the mean of its divisors is an integer number (17773305).

Almost surely, 2^70446809 is an apocalyptic number.

It is an amenable number.

70446809 is a deficient number, since it is larger than the sum of its proper divisors (646411).

70446809 is a wasteful number, since it uses less digits than its factorization.

70446809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646410.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 70446809 is about 8393.2597362407. The cubic root of 70446809 is about 413.0035410586.

The spelling of 70446809 in words is "seventy million, four hundred forty-six thousand, eight hundred nine".