79242981 has 16 divisors (see below), whose sum is σ = 110522880. Its totient is φ = 50407280.

The previous prime is 79242973. The next prime is 79242983. The reversal of 79242981 is 18924297.

It is a cyclic number.

It is not a de Polignac number, because 79242981 - 2³ = 79242973 is a prime.

It is a super-2 number, since 2×79242981² = 12558900075532722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79242983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32710 + ... + 35048.

It is an arithmetic number, because the mean of its divisors is an integer number (6907680).

Almost surely, 2^79242981 is an apocalyptic number.

It is an amenable number.

79242981 is a deficient number, since it is larger than the sum of its proper divisors (31279899).

79242981 is a wasteful number, since it uses less digits than its factorization.

79242981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856.

The product of its digits is 72576, while the sum is 42.

The square root of 79242981 is about 8901.8526723374. The cubic root of 79242981 is about 429.5235049881.

The spelling of 79242981 in words is "seventy-nine million, two hundred forty-two thousand, nine hundred eighty-one".