80387921 has 8 divisors (see below), whose sum is σ = 85929984. Its totient is φ = 75016480.

The previous prime is 80387899. The next prime is 80387927. The reversal of 80387921 is 12978308.

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 80387921 - 2²² = 76193617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80387927) 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, 41681 + ... + 43566.

It is an arithmetic number, because the mean of its divisors is an integer number (10741248).

Almost surely, 2^80387921 is an apocalyptic number.

It is an amenable number.

80387921 is a deficient number, since it is larger than the sum of its proper divisors (5542063).

80387921 is a wasteful number, since it uses less digits than its factorization.

80387921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85311.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 80387921 is about 8965.9311284439. The cubic root of 80387921 is about 431.5822740330.

The spelling of 80387921 in words is "eighty million, three hundred eighty-seven thousand, nine hundred twenty-one".