31423326647 has 2 divisors, whose sum is σ = 31423326648. Its totient is φ = 31423326646.

The previous prime is 31423326629. The next prime is 31423326689. The reversal of 31423326647 is 74662332413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31423326647 - 2¹² = 31423322551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31423320647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711663323 + 15711663324.

It is an arithmetic number, because the mean of its divisors is an integer number (15711663324).

Almost surely, 2^31423326647 is an apocalyptic number.

31423326647 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423326647 is an equidigital number, since it uses as much as digits as its factorization.

31423326647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 41.

The spelling of 31423326647 in words is "thirty-one billion, four hundred twenty-three million, three hundred twenty-six thousand, six hundred forty-seven".