80779149 has 24 divisors (see below), whose sum is σ = 131399424. Its totient is φ = 47376000.

The previous prime is 80779129. The next prime is 80779157. The reversal of 80779149 is 94197708.

It is not a de Polignac number, because 80779149 - 2⁵ = 80779117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80779109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10092 + ... + 16229.

It is an arithmetic number, because the mean of its divisors is an integer number (5474976).

Almost surely, 2^80779149 is an apocalyptic number.

It is an amenable number.

80779149 is a deficient number, since it is larger than the sum of its proper divisors (50620275).

80779149 is a wasteful number, since it uses less digits than its factorization.

80779149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26369 (or 26366 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 80779149 is about 8987.7221252106. The cubic root of 80779149 is about 432.2812757975.

The spelling of 80779149 in words is "eighty million, seven hundred seventy-nine thousand, one hundred forty-nine".