31048739947 has 2 divisors, whose sum is σ = 31048739948. Its totient is φ = 31048739946.

The previous prime is 31048739863. The next prime is 31048739959. The reversal of 31048739947 is 74993784013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31048739947 - 2³¹ = 28901256299 is a prime.

It is not a weakly prime, because it can be changed into another prime (31048739977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15524369973 + 15524369974.

It is an arithmetic number, because the mean of its divisors is an integer number (15524369974).

Almost surely, 2^31048739947 is an apocalyptic number.

31048739947 is a deficient number, since it is larger than the sum of its proper divisors (1).

31048739947 is an equidigital number, since it uses as much as digits as its factorization.

31048739947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 31048739947 in words is "thirty-one billion, forty-eight million, seven hundred thirty-nine thousand, nine hundred forty-seven".