73818139 has 4 divisors (see below), whose sum is σ = 74168200. Its totient is φ = 73468080.

The previous prime is 73818133. The next prime is 73818167. The reversal of 73818139 is 93181837.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93181837 = 7 ⋅13311691.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73818139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73818133) 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 3 ways as a sum of consecutive naturals, for example, 174714 + ... + 175135.

It is an arithmetic number, because the mean of its divisors is an integer number (18542050).

Almost surely, 2^73818139 is an apocalyptic number.

73818139 is a deficient number, since it is larger than the sum of its proper divisors (350061).

73818139 is a wasteful number, since it uses less digits than its factorization.

73818139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350060.

The product of its digits is 36288, while the sum is 40.

The square root of 73818139 is about 8591.7483086971. The cubic root of 73818139 is about 419.4894381796.

The spelling of 73818139 in words is "seventy-three million, eight hundred eighteen thousand, one hundred thirty-nine".