77919963 has 8 divisors (see below), whose sum is σ = 113338176. Its totient is φ = 47224200.

The previous prime is 77919949. The next prime is 77919971. The reversal of 77919963 is 36991977.

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

It is not a de Polignac number, because 77919963 - 2⁶ = 77919899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77919973) 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, 1180573 + ... + 1180638.

It is an arithmetic number, because the mean of its divisors is an integer number (14167272).

Almost surely, 2^77919963 is an apocalyptic number.

77919963 is a deficient number, since it is larger than the sum of its proper divisors (35418213).

77919963 is a wasteful number, since it uses less digits than its factorization.

77919963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361225.

The product of its digits is 642978, while the sum is 51.

The square root of 77919963 is about 8827.2285004978. The cubic root of 77919963 is about 427.1196767951.

The spelling of 77919963 in words is "seventy-seven million, nine hundred nineteen thousand, nine hundred sixty-three".