79680494 has 4 divisors (see below), whose sum is σ = 119520744. Its totient is φ = 39840246.

The previous prime is 79680493. The next prime is 79680511. The reversal of 79680494 is 49408697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49408697 = 13 ⋅3800669.

It is a super-2 number, since 2×79680494² = 12697962248168072, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79680493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19920122 + ... + 19920125.

It is an arithmetic number, because the mean of its divisors is an integer number (29880186).

Almost surely, 2^79680494 is an apocalyptic number.

79680494 is a deficient number, since it is larger than the sum of its proper divisors (39840250).

79680494 is a wasteful number, since it uses less digits than its factorization.

79680494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39840249.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 79680494 is about 8926.3931125623. The cubic root of 79680494 is about 430.3125436411.

The spelling of 79680494 in words is "seventy-nine million, six hundred eighty thousand, four hundred ninety-four".