31406743 has 2 divisors, whose sum is σ = 31406744. Its totient is φ = 31406742.

The previous prime is 31406741. The next prime is 31406783. The reversal of 31406743 is 34760413.

It is a weak prime.

It is an emirp because it is prime and its reverse (34760413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31406743 - 2¹ = 31406741 is a prime.

Together with 31406741, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31406741) 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, 15703371 + 15703372.

It is an arithmetic number, because the mean of its divisors is an integer number (15703372).

Almost surely, 2^31406743 is an apocalyptic number.

31406743 is a deficient number, since it is larger than the sum of its proper divisors (1).

31406743 is an equidigital number, since it uses as much as digits as its factorization.

31406743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 31406743 is about 5604.1719281264. The cubic root of 31406743 is about 315.5060079242.

The spelling of 31406743 in words is "thirty-one million, four hundred six thousand, seven hundred forty-three".