80395621 has 4 divisors (see below), whose sum is σ = 81713644. Its totient is φ = 79077600.

The previous prime is 80395619. The next prime is 80395633. The reversal of 80395621 is 12659308.

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 1718721 + 78676900 = 1311^2 + 8870^2 .

It is a cyclic number.

It is not a de Polignac number, because 80395621 - 2¹ = 80395619 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 (80395661) 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, 658920 + ... + 659041.

It is an arithmetic number, because the mean of its divisors is an integer number (20428411).

Almost surely, 2^80395621 is an apocalyptic number.

It is an amenable number.

80395621 is a deficient number, since it is larger than the sum of its proper divisors (1318023).

80395621 is a wasteful number, since it uses less digits than its factorization.

80395621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318022.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 80395621 is about 8966.3605214156. The cubic root of 80395621 is about 431.5960533727.

The spelling of 80395621 in words is "eighty million, three hundred ninety-five thousand, six hundred twenty-one".