77980329 has 12 divisors (see below), whose sum is σ = 128729536. Its totient is φ = 44560152.

The previous prime is 77980321. The next prime is 77980361. The reversal of 77980329 is 92308977.

It is not a de Polignac number, because 77980329 - 2³ = 77980321 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 (77980321) 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 11 ways as a sum of consecutive naturals, for example, 618829 + ... + 618954.

Almost surely, 2^77980329 is an apocalyptic number.

It is an amenable number.

77980329 is a deficient number, since it is larger than the sum of its proper divisors (50749207).

77980329 is a wasteful number, since it uses less digits than its factorization.

77980329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237796 (or 1237793 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 77980329 is about 8830.6471450285. The cubic root of 77980329 is about 427.2299474282.

The spelling of 77980329 in words is "seventy-seven million, nine hundred eighty thousand, three hundred twenty-nine".