79981654 has 8 divisors (see below), whose sum is σ = 121491360. Its totient is φ = 39484536.

The previous prime is 79981637. The next prime is 79981667. The reversal of 79981654 is 45618997.

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 = 79981598 and 79981607.

It is a congruent number.

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, 252949 + ... + 253264.

It is an arithmetic number, because the mean of its divisors is an integer number (15186420).

Almost surely, 2^79981654 is an apocalyptic number.

79981654 is a deficient number, since it is larger than the sum of its proper divisors (41509706).

79981654 is a wasteful number, since it uses less digits than its factorization.

79981654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506294.

The product of its digits is 544320, while the sum is 49.

The square root of 79981654 is about 8943.2462786172. The cubic root of 79981654 is about 430.8539977726.

The spelling of 79981654 in words is "seventy-nine million, nine hundred eighty-one thousand, six hundred fifty-four".