79744939 has 4 divisors (see below), whose sum is σ = 79815256. Its totient is φ = 79674624.

The previous prime is 79744937. The next prime is 79744963. The reversal of 79744939 is 93944797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93944797 = 19 ⋅4944463.

It is a cyclic number.

It is not a de Polignac number, because 79744939 - 2¹ = 79744937 is a prime.

It is a super-2 number, since 2×79744939² = 12718510592227442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79744937) 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, 33429 + ... + 35734.

It is an arithmetic number, because the mean of its divisors is an integer number (19953814).

Almost surely, 2^79744939 is an apocalyptic number.

79744939 is a deficient number, since it is larger than the sum of its proper divisors (70317).

79744939 is a wasteful number, since it uses less digits than its factorization.

79744939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70316.

The product of its digits is 1714608, while the sum is 52.

The square root of 79744939 is about 8930.0021836503. The cubic root of 79744939 is about 430.4285235901.

The spelling of 79744939 in words is "seventy-nine million, seven hundred forty-four thousand, nine hundred thirty-nine".