80961759 has 6 divisors (see below), whose sum is σ = 116944776. Its totient is φ = 53974500.

The previous prime is 80961743. The next prime is 80961761. The reversal of 80961759 is 95716908.

It is not a de Polignac number, because 80961759 - 2⁴ = 80961743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80961659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4497867 + ... + 4497884.

It is an arithmetic number, because the mean of its divisors is an integer number (19490796).

Almost surely, 2^80961759 is an apocalyptic number.

80961759 is a deficient number, since it is larger than the sum of its proper divisors (35983017).

80961759 is a wasteful number, since it uses less digits than its factorization.

80961759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8995757 (or 8995754 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 80961759 is about 8997.8752491908. The cubic root of 80961759 is about 432.6067701693.

The spelling of 80961759 in words is "eighty million, nine hundred sixty-one thousand, seven hundred fifty-nine".