80388721 has 8 divisors (see below), whose sum is σ = 92387520. Its totient is φ = 68518608.

The previous prime is 80388713. The next prime is 80388731. The reversal of 80388721 is 12788308.

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 80388721 - 2³ = 80388713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80388701) 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, 30826 + ... + 33331.

It is an arithmetic number, because the mean of its divisors is an integer number (11548440).

Almost surely, 2^80388721 is an apocalyptic number.

It is an amenable number.

80388721 is a deficient number, since it is larger than the sum of its proper divisors (11998799).

80388721 is a wasteful number, since it uses less digits than its factorization.

80388721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64343.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 80388721 is about 8965.9757416580. The cubic root of 80388721 is about 431.5837056936.

The spelling of 80388721 in words is "eighty million, three hundred eighty-eight thousand, seven hundred twenty-one".