73947783779 has 4 divisors (see below), whose sum is σ = 73949181576. Its totient is φ = 73946385984.

The previous prime is 73947783737. The next prime is 73947783809. The reversal of 73947783779 is 97738774937.

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

It is a cyclic number.

It is not a de Polignac number, because 73947783779 - 2³⁶ = 5228307043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73947783179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616289 + ... + 726434.

It is an arithmetic number, because the mean of its divisors is an integer number (18487295394).

Almost surely, 2^73947783779 is an apocalyptic number.

73947783779 is a deficient number, since it is larger than the sum of its proper divisors (1397797).

73947783779 is a wasteful number, since it uses less digits than its factorization.

73947783779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397796.

The product of its digits is 392073696, while the sum is 71.

The spelling of 73947783779 in words is "seventy-three billion, nine hundred forty-seven million, seven hundred eighty-three thousand, seven hundred seventy-nine".