42831749 has 4 divisors (see below), whose sum is σ = 42851136. Its totient is φ = 42812364.

The previous prime is 42831713. The next prime is 42831751. The reversal of 42831749 is 94713824.

42831749 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, 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 42831749 - 2⁸ = 42831493 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 (42831709) 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, 5879 + ... + 10964.

It is an arithmetic number, because the mean of its divisors is an integer number (10712784).

Almost surely, 2^42831749 is an apocalyptic number.

It is an amenable number.

42831749 is a deficient number, since it is larger than the sum of its proper divisors (19387).

42831749 is a wasteful number, since it uses less digits than its factorization.

42831749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19386.

The product of its digits is 48384, while the sum is 38.

The square root of 42831749 is about 6544.5969318209. The cubic root of 42831749 is about 349.8822706079.

The spelling of 42831749 in words is "forty-two million, eight hundred thirty-one thousand, seven hundred forty-nine".