79787755 has 4 divisors (see below), whose sum is σ = 95745312. Its totient is φ = 63830200.

The previous prime is 79787753. The next prime is 79787761. The reversal of 79787755 is 55778797.

It is a happy number.

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

It is not a de Polignac number, because 79787755 - 2¹ = 79787753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79787696 and 79787705.

It is not an unprimeable number, because it can be changed into a prime (79787753) 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, 7978771 + ... + 7978780.

It is an arithmetic number, because the mean of its divisors is an integer number (23936328).

Almost surely, 2^79787755 is an apocalyptic number.

79787755 is a deficient number, since it is larger than the sum of its proper divisors (15957557).

79787755 is a wasteful number, since it uses less digits than its factorization.

79787755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15957556.

The product of its digits is 4321800, while the sum is 55.

The square root of 79787755 is about 8932.3991737942. The cubic root of 79787755 is about 430.5055438608.

The spelling of 79787755 in words is "seventy-nine million, seven hundred eighty-seven thousand, seven hundred fifty-five".