80966987 has 4 divisors (see below), whose sum is σ = 82494720. Its totient is φ = 79439256.

The previous prime is 80966933. The next prime is 80967011. The reversal of 80966987 is 78966908.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80966987 - 2⁸ = 80966731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 1527679 = 80966987 / (8 + 0 + 9 + 6 + 6 + 9 + 8 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80966287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763787 + ... + 763892.

It is an arithmetic number, because the mean of its divisors is an integer number (20623680).

Almost surely, 2^80966987 is an apocalyptic number.

80966987 is a deficient number, since it is larger than the sum of its proper divisors (1527733).

80966987 is a wasteful number, since it uses less digits than its factorization.

80966987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527732.

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

The square root of 80966987 is about 8998.1657575308. The cubic root of 80966987 is about 432.6160816416.

The spelling of 80966987 in words is "eighty million, nine hundred sixty-six thousand, nine hundred eighty-seven".