77632079 has 4 divisors (see below), whose sum is σ = 88722384. Its totient is φ = 66541776.

The previous prime is 77632067. The next prime is 77632097. The reversal of 77632079 is 97023677.

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

It is not a de Polignac number, because 77632079 - 2²⁰ = 76583503 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 (77632019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5545142 + ... + 5545155.

It is an arithmetic number, because the mean of its divisors is an integer number (22180596).

Almost surely, 2^77632079 is an apocalyptic number.

77632079 is a deficient number, since it is larger than the sum of its proper divisors (11090305).

77632079 is a wasteful number, since it uses less digits than its factorization.

77632079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11090304.

The product of its (nonzero) digits is 111132, while the sum is 41.

The square root of 77632079 is about 8810.9068205265. The cubic root of 77632079 is about 426.5930138843.

The spelling of 77632079 in words is "seventy-seven million, six hundred thirty-two thousand, seventy-nine".