731149121 has 8 divisors (see below), whose sum is σ = 737748000. Its totient is φ = 724565920.

The previous prime is 731149099. The next prime is 731149123. The reversal of 731149121 is 121941137.

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 731149121 - 2¹⁸ = 730886977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731149123) 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, 102530 + ... + 109428.

It is an arithmetic number, because the mean of its divisors is an integer number (92218500).

Almost surely, 2^731149121 is an apocalyptic number.

It is an amenable number.

731149121 is a deficient number, since it is larger than the sum of its proper divisors (6598879).

731149121 is a wasteful number, since it uses less digits than its factorization.

731149121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7839.

The product of its digits is 1512, while the sum is 29.

The square root of 731149121 is about 27039.7692482758. The cubic root of 731149121 is about 900.8835442609.

The spelling of 731149121 in words is "seven hundred thirty-one million, one hundred forty-nine thousand, one hundred twenty-one".