79554821 has 8 divisors (see below), whose sum is σ = 80668224. Its totient is φ = 78448480.

The previous prime is 79554809. The next prime is 79554863. The reversal of 79554821 is 12845597.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79554821 - 2¹⁰ = 79553797 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 (79554521) 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, 23336 + ... + 26526.

It is an arithmetic number, because the mean of its divisors is an integer number (10083528).

Almost surely, 2^79554821 is an apocalyptic number.

It is an amenable number.

79554821 is a deficient number, since it is larger than the sum of its proper divisors (1113403).

79554821 is a wasteful number, since it uses less digits than its factorization.

79554821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3531.

The product of its digits is 100800, while the sum is 41.

The square root of 79554821 is about 8919.3509292997. The cubic root of 79554821 is about 430.0861932857.

The spelling of 79554821 in words is "seventy-nine million, five hundred fifty-four thousand, eight hundred twenty-one".