74639129 has 8 divisors (see below), whose sum is σ = 79430400. Its totient is φ = 69892416.

The previous prime is 74639111. The next prime is 74639143. The reversal of 74639129 is 92193647.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74639129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74639329) 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, 7649 + ... + 14414.

It is an arithmetic number, because the mean of its divisors is an integer number (9928800).

Almost surely, 2^74639129 is an apocalyptic number.

It is an amenable number.

74639129 is a deficient number, since it is larger than the sum of its proper divisors (4791271).

74639129 is a wasteful number, since it uses less digits than its factorization.

74639129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22279.

The product of its digits is 81648, while the sum is 41.

The square root of 74639129 is about 8639.3940181010. The cubic root of 74639129 is about 421.0388662745.

The spelling of 74639129 in words is "seventy-four million, six hundred thirty-nine thousand, one hundred twenty-nine".