80986945 has 8 divisors (see below), whose sum is σ = 104660136. Its totient is φ = 59805696.

The previous prime is 80986903. The next prime is 80986967. The reversal of 80986945 is 54968908.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14205361 + 66781584 = 3769^2 + 8172^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80986945 - 2¹⁵ = 80954177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622912 + ... + 623041.

It is an arithmetic number, because the mean of its divisors is an integer number (13082517).

Almost surely, 2^80986945 is an apocalyptic number.

It is an amenable number.

80986945 is a deficient number, since it is larger than the sum of its proper divisors (23673191).

80986945 is a wasteful number, since it uses less digits than its factorization.

80986945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245971.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 80986945 is about 8999.2746929961. The cubic root of 80986945 is about 432.6516246974.

The spelling of 80986945 in words is "eighty million, nine hundred eighty-six thousand, nine hundred forty-five".