79800498421 has 4 divisors (see below), whose sum is σ = 91200569632. Its totient is φ = 68400427212.

The previous prime is 79800498377. The next prime is 79800498431. The reversal of 79800498421 is 12489400897.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 79800498421 - 2¹³ = 79800490229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79800498431) 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, 5700035595 + ... + 5700035608.

It is an arithmetic number, because the mean of its divisors is an integer number (22800142408).

Almost surely, 2^79800498421 is an apocalyptic number.

It is an amenable number.

79800498421 is a deficient number, since it is larger than the sum of its proper divisors (11400071211).

79800498421 is a wasteful number, since it uses less digits than its factorization.

79800498421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11400071210.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 79800498421 in words is "seventy-nine billion, eight hundred million, four hundred ninety-eight thousand, four hundred twenty-one".