79144661 has 2 divisors, whose sum is σ = 79144662. Its totient is φ = 79144660.

The previous prime is 79144657. The next prime is 79144697. The reversal of 79144661 is 16644197.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41088100 + 38056561 = 6410^2 + 6169^2 .

It is an emirp because it is prime and its reverse (16644197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79144661 - 2² = 79144657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79144601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39572330 + 39572331.

It is an arithmetic number, because the mean of its divisors is an integer number (39572331).

Almost surely, 2^79144661 is an apocalyptic number.

It is an amenable number.

79144661 is a deficient number, since it is larger than the sum of its proper divisors (1).

79144661 is an equidigital number, since it uses as much as digits as its factorization.

79144661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 79144661 is about 8896.3285123696. The cubic root of 79144661 is about 429.3457890217.

The spelling of 79144661 in words is "seventy-nine million, one hundred forty-four thousand, six hundred sixty-one".