80394779 has 4 divisors (see below), whose sum is σ = 80439576. Its totient is φ = 80349984.

The previous prime is 80394773. The next prime is 80394781. The reversal of 80394779 is 97749308.

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 80394779 - 2⁴ = 80394763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80394773) 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, 19589 + ... + 23334.

It is an arithmetic number, because the mean of its divisors is an integer number (20109894).

Almost surely, 2^80394779 is an apocalyptic number.

80394779 is a deficient number, since it is larger than the sum of its proper divisors (44797).

80394779 is a wasteful number, since it uses less digits than its factorization.

80394779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44796.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 80394779 is about 8966.3135680167. The cubic root of 80394779 is about 431.5945466358.

The spelling of 80394779 in words is "eighty million, three hundred ninety-four thousand, seven hundred seventy-nine".