73121417 has 4 divisors (see below), whose sum is σ = 73468176. Its totient is φ = 72774660.

The previous prime is 73121407. The next prime is 73121431. The reversal of 73121417 is 71412137.

It is a happy number.

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 73121417 - 2⁴ = 73121401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73121407) 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, 173063 + ... + 173484.

It is an arithmetic number, because the mean of its divisors is an integer number (18367044).

Almost surely, 2^73121417 is an apocalyptic number.

It is an amenable number.

73121417 is a deficient number, since it is larger than the sum of its proper divisors (346759).

73121417 is a wasteful number, since it uses less digits than its factorization.

73121417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346758.

The product of its digits is 1176, while the sum is 26.

The square root of 73121417 is about 8551.1061857516. The cubic root of 73121417 is about 418.1655003471.

The spelling of 73121417 in words is "seventy-three million, one hundred twenty-one thousand, four hundred seventeen".