31101994747 has 2 divisors, whose sum is σ = 31101994748. Its totient is φ = 31101994746.

The previous prime is 31101994741. The next prime is 31101994757. The reversal of 31101994747 is 74749910113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31101994747 - 2¹⁹ = 31101470459 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31101994697 and 31101994706.

It is not a weakly prime, because it can be changed into another prime (31101994741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15550997373 + 15550997374.

It is an arithmetic number, because the mean of its divisors is an integer number (15550997374).

Almost surely, 2^31101994747 is an apocalyptic number.

31101994747 is a deficient number, since it is larger than the sum of its proper divisors (1).

31101994747 is an equidigital number, since it uses as much as digits as its factorization.

31101994747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 46.

The spelling of 31101994747 in words is "thirty-one billion, one hundred one million, nine hundred ninety-four thousand, seven hundred forty-seven".