80687969 has 2 divisors, whose sum is σ = 80687970. Its totient is φ = 80687968.

The previous prime is 80687953. The next prime is 80687983. The reversal of 80687969 is 96978608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56550400 + 24137569 = 7520^2 + 4913^2 .

It is a cyclic number.

It is not a de Polignac number, because 80687969 - 2⁴ = 80687953 is a prime.

It is a super-2 number, since 2×80687969² = 13021096682689922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80687969.

It is not a weakly prime, because it can be changed into another prime (80687939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40343984 + 40343985.

It is an arithmetic number, because the mean of its divisors is an integer number (40343985).

Almost surely, 2^80687969 is an apocalyptic number.

It is an amenable number.

80687969 is a deficient number, since it is larger than the sum of its proper divisors (1).

80687969 is an equidigital number, since it uses as much as digits as its factorization.

80687969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 80687969 is about 8982.6482175359. The cubic root of 80687969 is about 432.1185677776.

The spelling of 80687969 in words is "eighty million, six hundred eighty-seven thousand, nine hundred sixty-nine".