80779391 has 24 divisors (see below), whose sum is σ = 103965264. Its totient is φ = 62052480.

The previous prime is 80779373. The next prime is 80779453. The reversal of 80779391 is 19397708.

It is not a de Polignac number, because 80779391 - 2¹⁸ = 80517247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80779331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38321 + ... + 40373.

It is an arithmetic number, because the mean of its divisors is an integer number (4331886).

Almost surely, 2^80779391 is an apocalyptic number.

80779391 is a deficient number, since it is larger than the sum of its proper divisors (23185873).

80779391 is a wasteful number, since it uses less digits than its factorization.

80779391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151 (or 2144 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 80779391 is about 8987.7355880110. The cubic root of 80779391 is about 432.2817074764.

The spelling of 80779391 in words is "eighty million, seven hundred seventy-nine thousand, three hundred ninety-one".