319142749 has 8 divisors (see below), whose sum is σ = 322081760. Its totient is φ = 316213200.

The previous prime is 319142731. The next prime is 319142773. The reversal of 319142749 is 947241913.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 319142749 - 2¹⁷ = 319011677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319146749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77359 + ... + 81379.

It is an arithmetic number, because the mean of its divisors is an integer number (40260220).

Almost surely, 2^319142749 is an apocalyptic number.

It is an amenable number.

319142749 is a deficient number, since it is larger than the sum of its proper divisors (2939011).

319142749 is a wasteful number, since it uses less digits than its factorization.

319142749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4731.

The product of its digits is 54432, while the sum is 40.

The square root of 319142749 is about 17864.5668573296. The cubic root of 319142749 is about 683.3790497010.

The spelling of 319142749 in words is "three hundred nineteen million, one hundred forty-two thousand, seven hundred forty-nine".