73785413 has 4 divisors (see below), whose sum is σ = 79461228. Its totient is φ = 68109600.

The previous prime is 73785409. The next prime is 73785427. The reversal of 73785413 is 31458737.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8773444 + 65011969 = 2962^2 + 8063^2 .

It is not a de Polignac number, because 73785413 - 2² = 73785409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73785433) 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, 2837888 + ... + 2837913.

It is an arithmetic number, because the mean of its divisors is an integer number (19865307).

Almost surely, 2^73785413 is an apocalyptic number.

It is an amenable number.

73785413 is a deficient number, since it is larger than the sum of its proper divisors (5675815).

73785413 is a wasteful number, since it uses less digits than its factorization.

73785413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5675814.

The product of its digits is 70560, while the sum is 38.

The square root of 73785413 is about 8589.8435957822. The cubic root of 73785413 is about 419.4274378783.

The spelling of 73785413 in words is "seventy-three million, seven hundred eighty-five thousand, four hundred thirteen".