79945739 has 8 divisors (see below), whose sum is σ = 80801280. Its totient is φ = 79095016.

The previous prime is 79945727. The next prime is 79945741. The reversal of 79945739 is 93754997.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79945739 - 2²⁰ = 78897163 is a prime.

It is a super-2 number, since 2×79945739² = 12782642368512242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79941739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38912 + ... + 40914.

It is an arithmetic number, because the mean of its divisors is an integer number (10100160).

Almost surely, 2^79945739 is an apocalyptic number.

79945739 is a deficient number, since it is larger than the sum of its proper divisors (855541).

79945739 is a wasteful number, since it uses less digits than its factorization.

79945739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409.

The product of its digits is 2143260, while the sum is 53.

The square root of 79945739 is about 8941.2381133711. The cubic root of 79945739 is about 430.7894978225.

The spelling of 79945739 in words is "seventy-nine million, nine hundred forty-five thousand, seven hundred thirty-nine".