77388963 has 4 divisors (see below), whose sum is σ = 103185288. Its totient is φ = 51592640.

The previous prime is 77388959. The next prime is 77388973. The reversal of 77388963 is 36988377.

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 77388963 - 2² = 77388959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77388973) 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, 12898158 + ... + 12898163.

It is an arithmetic number, because the mean of its divisors is an integer number (25796322).

Almost surely, 2^77388963 is an apocalyptic number.

77388963 is a deficient number, since it is larger than the sum of its proper divisors (25796325).

77388963 is a wasteful number, since it uses less digits than its factorization.

77388963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25796324.

The product of its digits is 1524096, while the sum is 51.

The square root of 77388963 is about 8797.0996925123. The cubic root of 77388963 is about 426.1472357995.

The spelling of 77388963 in words is "seventy-seven million, three hundred eighty-eight thousand, nine hundred sixty-three".