74136539 has 4 divisors (see below), whose sum is σ = 74163960. Its totient is φ = 74109120.

The previous prime is 74136527. The next prime is 74136553. The reversal of 74136539 is 93563147.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93563147 = 773 ⋅121039.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74136539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74136739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9149 + ... + 15230.

It is an arithmetic number, because the mean of its divisors is an integer number (18540990).

Almost surely, 2^74136539 is an apocalyptic number.

74136539 is a deficient number, since it is larger than the sum of its proper divisors (27421).

74136539 is a wasteful number, since it uses less digits than its factorization.

74136539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27420.

The product of its digits is 68040, while the sum is 38.

The square root of 74136539 is about 8610.2577777904. The cubic root of 74136539 is about 420.0917014431.

The spelling of 74136539 in words is "seventy-four million, one hundred thirty-six thousand, five hundred thirty-nine".