73730121 has 8 divisors (see below), whose sum is σ = 101478144. Its totient is φ = 47567760.

The previous prime is 73730113. The next prime is 73730131. The reversal of 73730121 is 12103737.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73730121 - 2³ = 73730113 is a prime.

It is a super-2 number, since 2×73730121² = 10872261485349282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73730091 and 73730100.

It is not an unprimeable number, because it can be changed into a prime (73730131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396306 + ... + 396491.

It is an arithmetic number, because the mean of its divisors is an integer number (12684768).

Almost surely, 2^73730121 is an apocalyptic number.

It is an amenable number.

73730121 is a deficient number, since it is larger than the sum of its proper divisors (27748023).

73730121 is a wasteful number, since it uses less digits than its factorization.

73730121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792831.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 73730121 is about 8586.6245405281. The cubic root of 73730121 is about 419.3226440074.

Adding to 73730121 its reverse (12103737), we get a palindrome (85833858).

The spelling of 73730121 in words is "seventy-three million, seven hundred thirty thousand, one hundred twenty-one".