31240943 has 2 divisors, whose sum is σ = 31240944. Its totient is φ = 31240942.

The previous prime is 31240939. The next prime is 31240949. The reversal of 31240943 is 34904213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31240943 - 2² = 31240939 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31240949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620471 + 15620472.

It is an arithmetic number, because the mean of its divisors is an integer number (15620472).

Almost surely, 2^31240943 is an apocalyptic number.

31240943 is a deficient number, since it is larger than the sum of its proper divisors (1).

31240943 is an equidigital number, since it uses as much as digits as its factorization.

31240943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 31240943 is about 5589.3598023387. The cubic root of 31240943 is about 314.9498299203.

The spelling of 31240943 in words is "thirty-one million, two hundred forty thousand, nine hundred forty-three".