71979794 has 4 divisors (see below), whose sum is σ = 107969694. Its totient is φ = 35989896.

The previous prime is 71979779. The next prime is 71979829. The reversal of 71979794 is 49797917.

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

It can be written as a sum of positive squares in only one way, i.e., 55875625 + 16104169 = 7475^2 + 4013^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17994947 + ... + 17994950.

Almost surely, 2^71979794 is an apocalyptic number.

71979794 is a deficient number, since it is larger than the sum of its proper divisors (35989900).

71979794 is a wasteful number, since it uses less digits than its factorization.

71979794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35989899.

The product of its digits is 1000188, while the sum is 53.

The square root of 71979794 is about 8484.0906407228. The cubic root of 71979794 is about 415.9778441418.

The spelling of 71979794 in words is "seventy-one million, nine hundred seventy-nine thousand, seven hundred ninety-four".