73740409 has 4 divisors (see below), whose sum is σ = 73787904. Its totient is φ = 73692916.

The previous prime is 73740389. The next prime is 73740419. The reversal of 73740409 is 90404737.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73740409 - 2⁵ = 73740377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73740419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21337 + ... + 24550.

It is an arithmetic number, because the mean of its divisors is an integer number (18446976).

Almost surely, 2^73740409 is an apocalyptic number.

It is an amenable number.

73740409 is a deficient number, since it is larger than the sum of its proper divisors (47495).

73740409 is a wasteful number, since it uses less digits than its factorization.

73740409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47494.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 73740409 is about 8587.2235908936. The cubic root of 73740409 is about 419.3421466235.

The spelling of 73740409 in words is "seventy-three million, seven hundred forty thousand, four hundred nine".