77856963 has 8 divisors (see below), whose sum is σ = 104567568. Its totient is φ = 51525504.

The previous prime is 77856943. The next prime is 77856971. The reversal of 77856963 is 36965877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77856963 - 2⁶ = 77856899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77856943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94306 + ... + 95127.

It is an arithmetic number, because the mean of its divisors is an integer number (13070946).

Almost surely, 2^77856963 is an apocalyptic number.

77856963 is a deficient number, since it is larger than the sum of its proper divisors (26710605).

77856963 is a wasteful number, since it uses less digits than its factorization.

77856963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189573.

The product of its digits is 1905120, while the sum is 51.

The square root of 77856963 is about 8823.6592749267. The cubic root of 77856963 is about 427.0045338805.

The spelling of 77856963 in words is "seventy-seven million, eight hundred fifty-six thousand, nine hundred sixty-three".