80940779 has 4 divisors (see below), whose sum is σ = 85200840. Its totient is φ = 76680720.

The previous prime is 80940773. The next prime is 80940803. The reversal of 80940779 is 97704908.

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

It is a cyclic number.

It is not a de Polignac number, because 80940779 - 2⁴ = 80940763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80940773) 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, 2130002 + ... + 2130039.

It is an arithmetic number, because the mean of its divisors is an integer number (21300210).

Almost surely, 2^80940779 is an apocalyptic number.

80940779 is a deficient number, since it is larger than the sum of its proper divisors (4260061).

80940779 is a wasteful number, since it uses less digits than its factorization.

80940779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260060.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 80940779 is about 8996.7093428653. The cubic root of 80940779 is about 432.5693991346.

The spelling of 80940779 in words is "eighty million, nine hundred forty thousand, seven hundred seventy-nine".