77783793 has 4 divisors (see below), whose sum is σ = 103711728. Its totient is φ = 51855860.

The previous prime is 77783791. The next prime is 77783801. The reversal of 77783793 is 39738777.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77783793 - 2¹ = 77783791 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77783791) 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 in 3 ways as a sum of consecutive naturals, for example, 12963963 + ... + 12963968.

It is an arithmetic number, because the mean of its divisors is an integer number (25927932).

Almost surely, 2^77783793 is an apocalyptic number.

It is an amenable number.

77783793 is a deficient number, since it is larger than the sum of its proper divisors (25927935).

77783793 is a wasteful number, since it uses less digits than its factorization.

77783793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25927934.

The product of its digits is 1555848, while the sum is 51.

The square root of 77783793 is about 8819.5120613331. The cubic root of 77783793 is about 426.8707256192.

The spelling of 77783793 in words is "seventy-seven million, seven hundred eighty-three thousand, seven hundred ninety-three".