74437139 has 8 divisors (see below), whose sum is σ = 86096640. Its totient is φ = 63034056.

The previous prime is 74437133. The next prime is 74437157. The reversal of 74437139 is 93173447.

It is a happy number.

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 74437139 - 2⁴ = 74437123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74437133) 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, 63479 + ... + 64640.

It is an arithmetic number, because the mean of its divisors is an integer number (10762080).

Almost surely, 2^74437139 is an apocalyptic number.

74437139 is a deficient number, since it is larger than the sum of its proper divisors (11659501).

74437139 is a wasteful number, since it uses less digits than its factorization.

74437139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128209.

The product of its digits is 63504, while the sum is 38.

The square root of 74437139 is about 8627.6960423974. The cubic root of 74437139 is about 420.6587150288.

The spelling of 74437139 in words is "seventy-four million, four hundred thirty-seven thousand, one hundred thirty-nine".