80377021 has 2 divisors, whose sum is σ = 80377022. Its totient is φ = 80377020.

The previous prime is 80377001. The next prime is 80377027. The reversal of 80377021 is 12077308.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49140100 + 31236921 = 7010^2 + 5589^2 .

It is a cyclic number.

It is not a de Polignac number, because 80377021 - 2¹⁹ = 79852733 is a prime.

It is a Chen prime.

It is equal to p_4690081 and since 80377021 and 4690081 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80377027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40188510 + 40188511.

It is an arithmetic number, because the mean of its divisors is an integer number (40188511).

Almost surely, 2^80377021 is an apocalyptic number.

It is an amenable number.

80377021 is a deficient number, since it is larger than the sum of its proper divisors (1).

80377021 is an equidigital number, since it uses as much as digits as its factorization.

80377021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 80377021 is about 8965.3232512832. The cubic root of 80377021 is about 431.5627667100.

The spelling of 80377021 in words is "eighty million, three hundred seventy-seven thousand, twenty-one".