79321961 has 8 divisors (see below), whose sum is σ = 80077248. Its totient is φ = 78570000.

The previous prime is 79321943. The next prime is 79321987. The reversal of 79321961 is 16912397.

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 a de Polignac number, because none of the positive numbers 2^k-79321961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79321261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81206 + ... + 82176.

It is an arithmetic number, because the mean of its divisors is an integer number (10009656).

Almost surely, 2^79321961 is an apocalyptic number.

It is an amenable number.

79321961 is a deficient number, since it is larger than the sum of its proper divisors (755287).

79321961 is a wasteful number, since it uses less digits than its factorization.

79321961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663.

The product of its digits is 20412, while the sum is 38.

The square root of 79321961 is about 8906.2877227271. The cubic root of 79321961 is about 429.6661569591. Note that the first 3 decimals are identical.

The spelling of 79321961 in words is "seventy-nine million, three hundred twenty-one thousand, nine hundred sixty-one".