731073121 has 8 divisors (see below), whose sum is σ = 752016960. Its totient is φ = 710191728.

The previous prime is 731073103. The next prime is 731073131. The reversal of 731073121 is 121370137.

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

It is a cyclic number.

It is not a de Polignac number, because 731073121 - 2²⁷ = 596855393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731073131) 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, 8670 + ... + 39208.

It is an arithmetic number, because the mean of its divisors is an integer number (94002120).

Almost surely, 2^731073121 is an apocalyptic number.

It is an amenable number.

731073121 is a deficient number, since it is larger than the sum of its proper divisors (20943839).

731073121 is a wasteful number, since it uses less digits than its factorization.

731073121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31223.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 731073121 is about 27038.3638743175. The cubic root of 731073121 is about 900.8523287766.

It can be divided in two parts, 7310731 and 21, that multiplied together give a palindrome (153525351).

The spelling of 731073121 in words is "seven hundred thirty-one million, seventy-three thousand, one hundred twenty-one".