42939743 has 16 divisors (see below), whose sum is σ = 55265280. Its totient is φ = 32378400.

The previous prime is 42939737. The next prime is 42939769. The reversal of 42939743 is 34793924.

It is a cyclic number.

It is not a de Polignac number, because 42939743 - 2²² = 38745439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42939743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42939703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6608 + ... + 11381.

It is an arithmetic number, because the mean of its divisors is an integer number (3454080).

Almost surely, 2^42939743 is an apocalyptic number.

42939743 is a deficient number, since it is larger than the sum of its proper divisors (12325537).

42939743 is a wasteful number, since it uses less digits than its factorization.

42939743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18038.

The product of its digits is 163296, while the sum is 41.

The square root of 42939743 is about 6552.8423603807. The cubic root of 42939743 is about 350.1760828275.

The spelling of 42939743 in words is "forty-two million, nine hundred thirty-nine thousand, seven hundred forty-three".