80877197 has 2 divisors, whose sum is σ = 80877198. Its totient is φ = 80877196.

The previous prime is 80877193. The next prime is 80877239. The reversal of 80877197 is 79177808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80802121 + 75076 = 8989^2 + 274^2 .

It is a cyclic number.

It is not a de Polignac number, because 80877197 - 2² = 80877193 is a prime.

It is a super-2 number, since 2×80877197² = 13082241989153618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80877191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40438598 + 40438599.

It is an arithmetic number, because the mean of its divisors is an integer number (40438599).

Almost surely, 2^80877197 is an apocalyptic number.

It is an amenable number.

80877197 is a deficient number, since it is larger than the sum of its proper divisors (1).

80877197 is an equidigital number, since it uses as much as digits as its factorization.

80877197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 47.

The square root of 80877197 is about 8993.1750233163. The cubic root of 80877197 is about 432.4561029991.

The spelling of 80877197 in words is "eighty million, eight hundred seventy-seven thousand, one hundred ninety-seven".