79135961 has 4 divisors (see below), whose sum is σ = 80250624. Its totient is φ = 78021300.

The previous prime is 79135957. The next prime is 79135993. The reversal of 79135961 is 16953197.

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: 16953197 = 29 ⋅584593.

It is a cyclic number.

It is not a de Polignac number, because 79135961 - 2² = 79135957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79135061) 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, 557225 + ... + 557366.

It is an arithmetic number, because the mean of its divisors is an integer number (20062656).

Almost surely, 2^79135961 is an apocalyptic number.

79135961 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

79135961 is a deficient number, since it is larger than the sum of its proper divisors (1114663).

79135961 is a wasteful number, since it uses less digits than its factorization.

79135961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114662.

The product of its digits is 51030, while the sum is 41.

The square root of 79135961 is about 8895.8395331750. The cubic root of 79135961 is about 429.3300564580.

The spelling of 79135961 in words is "seventy-nine million, one hundred thirty-five thousand, nine hundred sixty-one".