73185013 has 4 divisors (see below), whose sum is σ = 79838208. Its totient is φ = 66531820.

The previous prime is 73184987. The next prime is 73185031. The reversal of 73185013 is 31058137.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31058137 = 11 ⋅2823467.

It is a cyclic number.

It is not a de Polignac number, because 73185013 - 2⁵ = 73184981 is a prime.

It is a super-2 number, since 2×73185013² = 10712092255620338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73185043) 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, 3326581 + ... + 3326602.

It is an arithmetic number, because the mean of its divisors is an integer number (19959552).

Almost surely, 2^73185013 is an apocalyptic number.

It is an amenable number.

73185013 is a deficient number, since it is larger than the sum of its proper divisors (6653195).

73185013 is a wasteful number, since it uses less digits than its factorization.

73185013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6653194.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 73185013 is about 8554.8239607838. The cubic root of 73185013 is about 418.2866957880.

The spelling of 73185013 in words is "seventy-three million, one hundred eighty-five thousand, thirteen".