73474639 has 4 divisors (see below), whose sum is σ = 83971024. Its totient is φ = 62978256.

The previous prime is 73474613. The next prime is 73474649. The reversal of 73474639 is 93647437.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93647437 = 13 ⋅7203649.

It is a cyclic number.

It is not a de Polignac number, because 73474639 - 2¹³ = 73466447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73474595 and 73474604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73474649) 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, 5248182 + ... + 5248195.

It is an arithmetic number, because the mean of its divisors is an integer number (20992756).

Almost surely, 2^73474639 is an apocalyptic number.

73474639 is a deficient number, since it is larger than the sum of its proper divisors (10496385).

73474639 is a wasteful number, since it uses less digits than its factorization.

73474639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10496384.

The product of its digits is 381024, while the sum is 43.

The square root of 73474639 is about 8571.7348885742. The cubic root of 73474639 is about 418.8377523380.

The spelling of 73474639 in words is "seventy-three million, four hundred seventy-four thousand, six hundred thirty-nine".