80961387 has 16 divisors (see below), whose sum is σ = 116433408. Its totient is φ = 49744800.

The previous prime is 80961379. The next prime is 80961407. The reversal of 80961387 is 78316908.

It is not a de Polignac number, because 80961387 - 2³ = 80961379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80961317) 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 15 ways as a sum of consecutive naturals, for example, 33262 + ... + 35612.

It is an arithmetic number, because the mean of its divisors is an integer number (7277088).

Almost surely, 2^80961387 is an apocalyptic number.

80961387 is a deficient number, since it is larger than the sum of its proper divisors (35472021).

80961387 is a wasteful number, since it uses less digits than its factorization.

80961387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3250.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 80961387 is about 8997.8545776202. The cubic root of 80961387 is about 432.6061075933.

The spelling of 80961387 in words is "eighty million, nine hundred sixty-one thousand, three hundred eighty-seven".