74739843 has 24 divisors (see below), whose sum is σ = 112497840. Its totient is φ = 47773440.

The previous prime is 74739799. The next prime is 74739869. The reversal of 74739843 is 34893747.

It is a happy number.

It is not a de Polignac number, because 74739843 - 2⁶ = 74739779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74732843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20055 + ... + 23487.

It is an arithmetic number, because the mean of its divisors is an integer number (4687410).

Almost surely, 2^74739843 is an apocalyptic number.

74739843 is a deficient number, since it is larger than the sum of its proper divisors (37757997).

74739843 is a wasteful number, since it uses less digits than its factorization.

74739843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539 (or 3536 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 74739843 is about 8645.2208184638. The cubic root of 74739843 is about 421.2281568448.

The spelling of 74739843 in words is "seventy-four million, seven hundred thirty-nine thousand, eight hundred forty-three".