79509814 has 4 divisors (see below), whose sum is σ = 119264724. Its totient is φ = 39754906.

The previous prime is 79509811. The next prime is 79509821. The reversal of 79509814 is 41890597.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41890597 = 7 ⋅5984371.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79509811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19877452 + ... + 19877455.

It is an arithmetic number, because the mean of its divisors is an integer number (29816181).

Almost surely, 2^79509814 is an apocalyptic number.

79509814 is a deficient number, since it is larger than the sum of its proper divisors (39754910).

79509814 is a wasteful number, since it uses less digits than its factorization.

79509814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39754909.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 79509814 is about 8916.8275748721. The cubic root of 79509814 is about 430.0050729526.

The spelling of 79509814 in words is "seventy-nine million, five hundred nine thousand, eight hundred fourteen".