799999783942 has 4 divisors (see below), whose sum is σ = 1199999675916. Its totient is φ = 399999891970.

The previous prime is 799999783939. The next prime is 799999783943. The reversal of 799999783942 is 249387999997.

799999783942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Smith number, since the sum of its digits (85) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 799999783942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (799999783943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199999945984 + ... + 199999945987.

It is an arithmetic number, because the mean of its divisors is an integer number (299999918979).

Almost surely, 2^799999783942 is an apocalyptic number.

799999783942 is a deficient number, since it is larger than the sum of its proper divisors (399999891974).

799999783942 is a wasteful number, since it uses less digits than its factorization.

799999783942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399999891973.

The product of its digits is 4999796928, while the sum is 85.

The spelling of 799999783942 in words is "seven hundred ninety-nine billion, nine hundred ninety-nine million, seven hundred eighty-three thousand, nine hundred forty-two".