31244123947 has 2 divisors, whose sum is σ = 31244123948. Its totient is φ = 31244123946.

The previous prime is 31244123929. The next prime is 31244123959. The reversal of 31244123947 is 74932144213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31244123947 is a prime.

It is not a weakly prime, because it can be changed into another prime (31244123447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15622061973 + 15622061974.

It is an arithmetic number, because the mean of its divisors is an integer number (15622061974).

Almost surely, 2^31244123947 is an apocalyptic number.

31244123947 is a deficient number, since it is larger than the sum of its proper divisors (1).

31244123947 is an equidigital number, since it uses as much as digits as its factorization.

31244123947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 40.

The spelling of 31244123947 in words is "thirty-one billion, two hundred forty-four million, one hundred twenty-three thousand, nine hundred forty-seven".