77864734 has 4 divisors (see below), whose sum is σ = 116797104. Its totient is φ = 38932366.

The previous prime is 77864723. The next prime is 77864737. The reversal of 77864734 is 43746877.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77864737) 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 as a sum of consecutive naturals, namely, 19466182 + ... + 19466185.

It is an arithmetic number, because the mean of its divisors is an integer number (29199276).

Almost surely, 2^77864734 is an apocalyptic number.

77864734 is a deficient number, since it is larger than the sum of its proper divisors (38932370).

77864734 is a wasteful number, since it uses less digits than its factorization.

77864734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38932369.

The product of its digits is 790272, while the sum is 46.

The square root of 77864734 is about 8824.0996141249. The cubic root of 77864734 is about 427.0187400251.

The spelling of 77864734 in words is "seventy-seven million, eight hundred sixty-four thousand, seven hundred thirty-four".