79732102421 has 4 divisors (see below), whose sum is σ = 79733089644. Its totient is φ = 79731115200.

The previous prime is 79732102361. The next prime is 79732102459. The reversal of 79732102421 is 12420123797.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17765957521 + 61966144900 = 133289^2 + 248930^2 .

It is a cyclic number.

It is not a de Polignac number, because 79732102421 - 2²⁶ = 79664993557 is a prime.

It is a super-2 number, since 2×79732102421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79732102481) 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, 360500 + ... + 537981.

It is an arithmetic number, because the mean of its divisors is an integer number (19933272411).

Almost surely, 2^79732102421 is an apocalyptic number.

It is an amenable number.

79732102421 is a deficient number, since it is larger than the sum of its proper divisors (987223).

79732102421 is an equidigital number, since it uses as much as digits as its factorization.

79732102421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987222.

The product of its (nonzero) digits is 42336, while the sum is 38.

The spelling of 79732102421 in words is "seventy-nine billion, seven hundred thirty-two million, one hundred two thousand, four hundred twenty-one".