80479621 has 2 divisors, whose sum is σ = 80479622. Its totient is φ = 80479620.

The previous prime is 80479589. The next prime is 80479657. The reversal of 80479621 is 12697408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52272900 + 28206721 = 7230^2 + 5311^2 .

It is a cyclic number.

It is not a de Polignac number, because 80479621 - 2⁵ = 80479589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80479661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40239810 + 40239811.

It is an arithmetic number, because the mean of its divisors is an integer number (40239811).

Almost surely, 2^80479621 is an apocalyptic number.

It is an amenable number.

80479621 is a deficient number, since it is larger than the sum of its proper divisors (1).

80479621 is an equidigital number, since it uses as much as digits as its factorization.

80479621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 80479621 is about 8971.0434733090. The cubic root of 80479621 is about 431.7463163218.

The spelling of 80479621 in words is "eighty million, four hundred seventy-nine thousand, six hundred twenty-one".