319781942 has 4 divisors (see below), whose sum is σ = 479672916. Its totient is φ = 159890970.

The previous prime is 319781939. The next prime is 319781971. The reversal of 319781942 is 249187913.

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

It is a junction number, because it is equal to n+sod(n) for n = 319781893 and 319781902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79945484 + ... + 79945487.

It is an arithmetic number, because the mean of its divisors is an integer number (119918229).

Almost surely, 2^319781942 is an apocalyptic number.

319781942 is a deficient number, since it is larger than the sum of its proper divisors (159890974).

319781942 is a wasteful number, since it uses less digits than its factorization.

319781942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159890973.

The product of its digits is 108864, while the sum is 44.

The square root of 319781942 is about 17882.4478749415. The cubic root of 319781942 is about 683.8349792277.

The spelling of 319781942 in words is "three hundred nineteen million, seven hundred eighty-one thousand, nine hundred forty-two".