31340297 has 2 divisors, whose sum is σ = 31340298. Its totient is φ = 31340296.

The previous prime is 31340293. The next prime is 31340303. The reversal of 31340297 is 79204313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16679056 + 14661241 = 4084^2 + 3829^2 .

It is a cyclic number.

It is not a de Polignac number, because 31340297 - 2² = 31340293 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31340293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15670148 + 15670149.

It is an arithmetic number, because the mean of its divisors is an integer number (15670149).

Almost surely, 2^31340297 is an apocalyptic number.

It is an amenable number.

31340297 is a deficient number, since it is larger than the sum of its proper divisors (1).

31340297 is an equidigital number, since it uses as much as digits as its factorization.

31340297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 31340297 is about 5598.2405271657. The cubic root of 31340297 is about 315.2833496465.

The spelling of 31340297 in words is "thirty-one million, three hundred forty thousand, two hundred ninety-seven".