77222307 has 4 divisors (see below), whose sum is σ = 102963080. Its totient is φ = 51481536.

The previous prime is 77222267. The next prime is 77222309. The reversal of 77222307 is 70322277.

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

It is not a de Polignac number, because 77222307 - 2⁸ = 77222051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77222309) 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, 12870382 + ... + 12870387.

It is an arithmetic number, because the mean of its divisors is an integer number (25740770).

Almost surely, 2^77222307 is an apocalyptic number.

77222307 is a deficient number, since it is larger than the sum of its proper divisors (25740773).

77222307 is a wasteful number, since it uses less digits than its factorization.

77222307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25740772.

The product of its (nonzero) digits is 8232, while the sum is 30.

The square root of 77222307 is about 8787.6223746813. The cubic root of 77222307 is about 425.8411153389.

Subtracting from 77222307 its sum of digits (30), we obtain a palindrome (77222277).

The spelling of 77222307 in words is "seventy-seven million, two hundred twenty-two thousand, three hundred seven".