79881514 has 4 divisors (see below), whose sum is σ = 119822274. Its totient is φ = 39940756.

The previous prime is 79881509. The next prime is 79881517. The reversal of 79881514 is 41518897.

It is a happy number.

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., 67158025 + 12723489 = 8195^2 + 3567^2 .

It is not an unprimeable number, because it can be changed into a prime (79881517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19970377 + ... + 19970380.

Almost surely, 2^79881514 is an apocalyptic number.

79881514 is a deficient number, since it is larger than the sum of its proper divisors (39940760).

79881514 is a wasteful number, since it uses less digits than its factorization.

79881514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39940759.

The product of its digits is 80640, while the sum is 43.

The square root of 79881514 is about 8937.6458869212. The cubic root of 79881514 is about 430.6741076086.

The spelling of 79881514 in words is "seventy-nine million, eight hundred eighty-one thousand, five hundred fourteen".