77869307 has 4 divisors (see below), whose sum is σ = 78195360. Its totient is φ = 77543256.

The previous prime is 77869301. The next prime is 77869327. The reversal of 77869307 is 70396877.

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

It is a cyclic number.

It is not a de Polignac number, because 77869307 - 2¹⁸ = 77607163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77869301) 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 3 ways as a sum of consecutive naturals, for example, 162668 + ... + 163145.

It is an arithmetic number, because the mean of its divisors is an integer number (19548840).

Almost surely, 2^77869307 is an apocalyptic number.

77869307 is a deficient number, since it is larger than the sum of its proper divisors (326053).

77869307 is a wasteful number, since it uses less digits than its factorization.

77869307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326052.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 77869307 is about 8824.3587302421. The cubic root of 77869307 is about 427.0270994726.

The spelling of 77869307 in words is "seventy-seven million, eight hundred sixty-nine thousand, three hundred seven".