79313749 has 4 divisors (see below), whose sum is σ = 79332064. Its totient is φ = 79295436.

The previous prime is 79313747. The next prime is 79313761. The reversal of 79313749 is 94731397.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94731397 = 19 ⋅4985863.

It is a cyclic number.

It is not a de Polignac number, because 79313749 - 2¹ = 79313747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79313747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1384 + ... + 12670.

It is an arithmetic number, because the mean of its divisors is an integer number (19833016).

Almost surely, 2^79313749 is an apocalyptic number.

It is an amenable number.

79313749 is a deficient number, since it is larger than the sum of its proper divisors (18315).

79313749 is a wasteful number, since it uses less digits than its factorization.

79313749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18314.

The product of its digits is 142884, while the sum is 43.

The square root of 79313749 is about 8905.8266881857. The cubic root of 79313749 is about 429.6513290341.

The spelling of 79313749 in words is "seventy-nine million, three hundred thirteen thousand, seven hundred forty-nine".