77688463 has 4 divisors (see below), whose sum is σ = 77710248. Its totient is φ = 77666680.

The previous prime is 77688433. The next prime is 77688469. The reversal of 77688463 is 36488677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36488677 = 103 ⋅354259.

It is a cyclic number.

It is not a de Polignac number, because 77688463 - 2⁵ = 77688431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77688469) 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, 4153 + ... + 13138.

It is an arithmetic number, because the mean of its divisors is an integer number (19427562).

Almost surely, 2^77688463 is an apocalyptic number.

77688463 is a deficient number, since it is larger than the sum of its proper divisors (21785).

77688463 is a wasteful number, since it uses less digits than its factorization.

77688463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21784.

The product of its digits is 1354752, while the sum is 49.

The square root of 77688463 is about 8814.1059104143. The cubic root of 77688463 is about 426.6962667317.

The spelling of 77688463 in words is "seventy-seven million, six hundred eighty-eight thousand, four hundred sixty-three".