31660050497 has 2 divisors, whose sum is σ = 31660050498. Its totient is φ = 31660050496.

The previous prime is 31660050467. The next prime is 31660050509. The reversal of 31660050497 is 79405006613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19258778176 + 12401272321 = 138776^2 + 111361^2 .

It is an emirp because it is prime and its reverse (79405006613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31660050497 - 2¹² = 31660046401 is a prime.

It is not a weakly prime, because it can be changed into another prime (31660050467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15830025248 + 15830025249.

It is an arithmetic number, because the mean of its divisors is an integer number (15830025249).

Almost surely, 2^31660050497 is an apocalyptic number.

It is an amenable number.

31660050497 is a deficient number, since it is larger than the sum of its proper divisors (1).

31660050497 is an equidigital number, since it uses as much as digits as its factorization.

31660050497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 41.

The spelling of 31660050497 in words is "thirty-one billion, six hundred sixty million, fifty thousand, four hundred ninety-seven".