70271979 has 4 divisors (see below), whose sum is σ = 93695976. Its totient is φ = 46847984.

The previous prime is 70271963. The next prime is 70271987. The reversal of 70271979 is 97917207.

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

It is a cyclic number.

It is not a de Polignac number, because 70271979 - 2⁴ = 70271963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70271979.

It is not an unprimeable number, because it can be changed into a prime (70171979) 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, 11711994 + ... + 11711999.

It is an arithmetic number, because the mean of its divisors is an integer number (23423994).

Almost surely, 2^70271979 is an apocalyptic number.

70271979 is a deficient number, since it is larger than the sum of its proper divisors (23423997).

70271979 is a wasteful number, since it uses less digits than its factorization.

70271979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23423996.

The product of its (nonzero) digits is 55566, while the sum is 42.

The square root of 70271979 is about 8382.8383617961. The cubic root of 70271979 is about 412.6616035313.

The spelling of 70271979 in words is "seventy million, two hundred seventy-one thousand, nine hundred seventy-nine".