74043939 has 4 divisors (see below), whose sum is σ = 98725256. Its totient is φ = 49362624.

The previous prime is 74043929. The next prime is 74043947. The reversal of 74043939 is 93934047.

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

It is not a de Polignac number, because 74043939 - 2⁷ = 74043811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74043897 and 74043906.

It is not an unprimeable number, because it can be changed into a prime (74043929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12340654 + ... + 12340659.

It is an arithmetic number, because the mean of its divisors is an integer number (24681314).

Almost surely, 2^74043939 is an apocalyptic number.

74043939 is a deficient number, since it is larger than the sum of its proper divisors (24681317).

74043939 is a wasteful number, since it uses less digits than its factorization.

74043939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24681316.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 74043939 is about 8604.8787905467. The cubic root of 74043939 is about 419.9167238522.

The spelling of 74043939 in words is "seventy-four million, forty-three thousand, nine hundred thirty-nine".