731913 has 24 divisors (see below), whose sum is σ = 1225728. Its totient is φ = 385056.

The previous prime is 731911. The next prime is 731921. The reversal of 731913 is 319137.

It is not a de Polignac number, because 731913 - 2¹ = 731911 is a prime.

731913 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 731913.

It is not an unprimeable number, because it can be changed into a prime (731911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1720 + ... + 2102.

It is an arithmetic number, because the mean of its divisors is an integer number (51072).

2⁷³¹⁹¹³ is an apocalyptic number.

It is an amenable number.

731913 is a deficient number, since it is larger than the sum of its proper divisors (493815).

731913 is a wasteful number, since it uses less digits than its factorization.

731913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 406 counting only the distinct ones).

The product of its digits is 567, while the sum is 24.

The square root of 731913 is about 855.5191406392. The cubic root of 731913 is about 90.1197172258.

The spelling of 731913 in words is "seven hundred thirty-one thousand, nine hundred thirteen".