80877397 has 2 divisors, whose sum is σ = 80877398. Its totient is φ = 80877396.

The previous prime is 80877389. The next prime is 80877413. The reversal of 80877397 is 79377808.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47803396 + 33074001 = 6914^2 + 5751^2 .

It is a cyclic number.

It is not a de Polignac number, because 80877397 - 2³ = 80877389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80877397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80877197) 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, 40438698 + 40438699.

It is an arithmetic number, because the mean of its divisors is an integer number (40438699).

Almost surely, 2^80877397 is an apocalyptic number.

It is an amenable number.

80877397 is a deficient number, since it is larger than the sum of its proper divisors (1).

80877397 is an equidigital number, since it uses as much as digits as its factorization.

80877397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 80877397 is about 8993.1861428528. The cubic root of 80877397 is about 432.4564594702.

The spelling of 80877397 in words is "eighty million, eight hundred seventy-seven thousand, three hundred ninety-seven".