79421651 has 4 divisors (see below), whose sum is σ = 80150400. Its totient is φ = 78692904.

The previous prime is 79421593. The next prime is 79421669. The reversal of 79421651 is 15612497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15612497 = 613 ⋅25469.

It is a cyclic number.

It is not a de Polignac number, because 79421651 - 2²⁶ = 12312787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79421051) 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, 364211 + ... + 364428.

It is an arithmetic number, because the mean of its divisors is an integer number (20037600).

Almost surely, 2^79421651 is an apocalyptic number.

79421651 is a deficient number, since it is larger than the sum of its proper divisors (728749).

79421651 is a wasteful number, since it uses less digits than its factorization.

79421651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728748.

The product of its digits is 15120, while the sum is 35.

The square root of 79421651 is about 8911.8825732838. The cubic root of 79421651 is about 429.8460797579.

The spelling of 79421651 in words is "seventy-nine million, four hundred twenty-one thousand, six hundred fifty-one".