731013121 has 8 divisors (see below), whose sum is σ = 765334080. Its totient is φ = 697299792.

The previous prime is 731013119. The next prime is 731013161. The reversal of 731013121 is 121310137.

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 731013121 - 2¹ = 731013119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731013161) 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, 149445 + ... + 154258.

It is an arithmetic number, because the mean of its divisors is an integer number (95666760).

Almost surely, 2^731013121 is an apocalyptic number.

It is an amenable number.

731013121 is a deficient number, since it is larger than the sum of its proper divisors (34320959).

731013121 is a wasteful number, since it uses less digits than its factorization.

731013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303815.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 731013121 is about 27037.2543169605. The cubic root of 731013121 is about 900.8276834450.

Adding to 731013121 its reverse (121310137), we get a palindrome (852323258).

The spelling of 731013121 in words is "seven hundred thirty-one million, thirteen thousand, one hundred twenty-one".