79919954 has 8 divisors (see below), whose sum is σ = 119927820. Its totient is φ = 39944016.

The previous prime is 79919933. The next prime is 79919971. The reversal of 79919954 is 45991997.

It can be written as a sum of positive squares in 2 ways, for example, as 72505225 + 7414729 = 8515^2 + 2723^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 79919896 and 79919905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209 + ... + 12644.

Almost surely, 2^79919954 is an apocalyptic number.

79919954 is a deficient number, since it is larger than the sum of its proper divisors (40007866).

79919954 is a wasteful number, since it uses less digits than its factorization.

79919954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15964.

The product of its digits is 918540, while the sum is 53.

The square root of 79919954 is about 8939.7960826856. The cubic root of 79919954 is about 430.7431784823.

It can be divided in two parts, 79919 and 954, that multiplied together give a triangular number (76242726 = T₁₂₃₄₈).

The spelling of 79919954 in words is "seventy-nine million, nine hundred nineteen thousand, nine hundred fifty-four".