80977275 has 72 divisors (see below), whose sum is σ = 152159904. Its totient is φ = 41126400.

The previous prime is 80977271. The next prime is 80977277. The reversal of 80977275 is 57277908.

It is not a de Polignac number, because 80977275 - 2² = 80977271 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 80977275.

It is not an unprimeable number, because it can be changed into a prime (80977271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 591007 + ... + 591143.

It is an arithmetic number, because the mean of its divisors is an integer number (2113332).

Almost surely, 2^80977275 is an apocalyptic number.

80977275 is a deficient number, since it is larger than the sum of its proper divisors (71182629).

80977275 is a wasteful number, since it uses less digits than its factorization.

80977275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The square root of 80977275 is about 8998.7374114372. The cubic root of 80977275 is about 432.6344041946.

The spelling of 80977275 in words is "eighty million, nine hundred seventy-seven thousand, two hundred seventy-five".