80371961 has 2 divisors, whose sum is σ = 80371962. Its totient is φ = 80371960.

The previous prime is 80371939. The next prime is 80371979. The reversal of 80371961 is 16917308.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64722025 + 15649936 = 8045^2 + 3956^2 .

It is a cyclic number.

It is not a de Polignac number, because 80371961 - 2¹⁰ = 80370937 is a prime.

It is a super-2 number, since 2×80371961² = 12919304229971042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80371261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40185980 + 40185981.

It is an arithmetic number, because the mean of its divisors is an integer number (40185981).

Almost surely, 2^80371961 is an apocalyptic number.

It is an amenable number.

80371961 is a deficient number, since it is larger than the sum of its proper divisors (1).

80371961 is an equidigital number, since it uses as much as digits as its factorization.

80371961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 80371961 is about 8965.0410484281. The cubic root of 80371961 is about 431.5537104175.

The spelling of 80371961 in words is "eighty million, three hundred seventy-one thousand, nine hundred sixty-one".