80981527 has 4 divisors (see below), whose sum is σ = 88343496. Its totient is φ = 73619560.

The previous prime is 80981521. The next prime is 80981561. The reversal of 80981527 is 72518908.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80981527 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 80981527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80981521) 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, 3680968 + ... + 3680989.

It is an arithmetic number, because the mean of its divisors is an integer number (22085874).

Almost surely, 2^80981527 is an apocalyptic number.

80981527 is a deficient number, since it is larger than the sum of its proper divisors (7361969).

80981527 is a wasteful number, since it uses less digits than its factorization.

80981527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7361968.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 80981527 is about 8998.9736637019. The cubic root of 80981527 is about 432.6419763984.

The spelling of 80981527 in words is "eighty million, nine hundred eighty-one thousand, five hundred twenty-seven".