731097 has 6 divisors (see below), whose sum is σ = 1056042. Its totient is φ = 487392.

The previous prime is 731057. The next prime is 731113. The reversal of 731097 is 790137.

It can be written as a sum of positive squares in only one way, i.e., 646416 + 84681 = 804^2 + 291^2 .

It is not a de Polignac number, because 731097 - 2⁶ = 731033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 731097.

It is not an unprimeable number, because it can be changed into a prime (731047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40608 + ... + 40625.

It is an arithmetic number, because the mean of its divisors is an integer number (176007).

2⁷³¹⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

731097 is a deficient number, since it is larger than the sum of its proper divisors (324945).

731097 is a wasteful number, since it uses less digits than its factorization.

731097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81239 (or 81236 counting only the distinct ones).

The product of its (nonzero) digits is 1323, while the sum is 27.

The square root of 731097 is about 855.0421042265. The cubic root of 731097 is about 90.0862136833.

The spelling of 731097 in words is "seven hundred thirty-one thousand, ninety-seven".