73405313 has 4 divisors (see below), whose sum is σ = 73559040. Its totient is φ = 73251588.

The previous prime is 73405307. The next prime is 73405327. The reversal of 73405313 is 31350437.

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: 31350437 = 19 ⋅1650023.

It is a cyclic number.

It is not a de Polignac number, because 73405313 - 2⁶ = 73405249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73405333) 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, 76145 + ... + 77102.

It is an arithmetic number, because the mean of its divisors is an integer number (18389760).

Almost surely, 2^73405313 is an apocalyptic number.

It is an amenable number.

73405313 is a deficient number, since it is larger than the sum of its proper divisors (153727).

73405313 is a wasteful number, since it uses less digits than its factorization.

73405313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153726.

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 73405313 is about 8567.6900620879. The cubic root of 73405313 is about 418.7059813238.

The spelling of 73405313 in words is "seventy-three million, four hundred five thousand, three hundred thirteen".