73417507921 has 4 divisors (see below), whose sum is σ = 73418636452. Its totient is φ = 73416379392.

The previous prime is 73417507913. The next prime is 73417507937. The reversal of 73417507921 is 12970571437.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12970571437 = 3511 ⋅3694267.

It can be written as a sum of positive squares in 2 ways, for example, as 37651133521 + 35766374400 = 194039^2 + 189120^2 .

It is a cyclic number.

It is not a de Polignac number, because 73417507921 - 2³ = 73417507913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73417507021) 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, 460296 + ... + 598921.

It is an arithmetic number, because the mean of its divisors is an integer number (18354659113).

Almost surely, 2^73417507921 is an apocalyptic number.

It is an amenable number.

73417507921 is a deficient number, since it is larger than the sum of its proper divisors (1128531).

73417507921 is a wasteful number, since it uses less digits than its factorization.

73417507921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128530.

The product of its (nonzero) digits is 370440, while the sum is 46.

The spelling of 73417507921 in words is "seventy-three billion, four hundred seventeen million, five hundred seven thousand, nine hundred twenty-one".