731040247 has 8 divisors (see below), whose sum is σ = 835738496. Its totient is φ = 626407992.

The previous prime is 731040241. The next prime is 731040253. The reversal of 731040247 is 742040137.

It is an interprime number because it is at equal distance from previous prime (731040241) and next prime (731040253).

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

It is not a de Polignac number, because 731040247 - 2¹⁵ = 731007479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731040241) 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, 10108 + ... + 39550.

It is an arithmetic number, because the mean of its divisors is an integer number (104467312).

Almost surely, 2^731040247 is an apocalyptic number.

731040247 is a deficient number, since it is larger than the sum of its proper divisors (104698249).

731040247 is a wasteful number, since it uses less digits than its factorization.

731040247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32997.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 731040247 is about 27037.7559534811. The cubic root of 731040247 is about 900.8388257664.

The spelling of 731040247 in words is "seven hundred thirty-one million, forty thousand, two hundred forty-seven".