70220909 has 16 divisors (see below), whose sum is σ = 80244864. Its totient is φ = 60825600.

The previous prime is 70220879. The next prime is 70220923. The reversal of 70220909 is 90902207.

It is a happy number.

It is not a de Polignac number, because 70220909 - 2⁸ = 70220653 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 (70220929) 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, 109229 + ... + 109869.

It is an arithmetic number, because the mean of its divisors is an integer number (5015304).

Almost surely, 2^70220909 is an apocalyptic number.

It is an amenable number.

70220909 is a deficient number, since it is larger than the sum of its proper divisors (10023955).

70220909 is a wasteful number, since it uses less digits than its factorization.

70220909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 70220909 is about 8379.7917038552. The cubic root of 70220909 is about 412.5616123457.

The spelling of 70220909 in words is "seventy million, two hundred twenty thousand, nine hundred nine".