80908987 has 4 divisors (see below), whose sum is σ = 81051256. Its totient is φ = 80766720.

The previous prime is 80908969. The next prime is 80909021. The reversal of 80908987 is 78980908.

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 80908987 - 2¹⁵ = 80876219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80908987.

It is not an unprimeable number, because it can be changed into a prime (80908187) 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, 70278 + ... + 71419.

It is an arithmetic number, because the mean of its divisors is an integer number (20262814).

Almost surely, 2^80908987 is an apocalyptic number.

80908987 is a deficient number, since it is larger than the sum of its proper divisors (142269).

80908987 is a wasteful number, since it uses less digits than its factorization.

80908987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142268.

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 80908987 is about 8994.9423010934. The cubic root of 80908987 is about 432.5127567044.

The spelling of 80908987 in words is "eighty million, nine hundred eight thousand, nine hundred eighty-seven".