80306621 has 2 divisors, whose sum is σ = 80306622. Its totient is φ = 80306620.

The previous prime is 80306617. The next prime is 80306651. The reversal of 80306621 is 12660308.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65205625 + 15100996 = 8075^2 + 3886^2 .

It is a cyclic number.

It is not a de Polignac number, because 80306621 - 2² = 80306617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80306651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40153310 + 40153311.

It is an arithmetic number, because the mean of its divisors is an integer number (40153311).

Almost surely, 2^80306621 is an apocalyptic number.

It is an amenable number.

80306621 is a deficient number, since it is larger than the sum of its proper divisors (1).

80306621 is an equidigital number, since it uses as much as digits as its factorization.

80306621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 80306621 is about 8961.3961523861. The cubic root of 80306621 is about 431.4367319595.

Adding to 80306621 its reverse (12660308), we get a palindrome (92966929).

The spelling of 80306621 in words is "eighty million, three hundred six thousand, six hundred twenty-one".