17712365947 has 2 divisors, whose sum is σ = 17712365948. Its totient is φ = 17712365946.

The previous prime is 17712365929. The next prime is 17712365959. The reversal of 17712365947 is 74956321771.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17712365947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17712365894 and 17712365903.

It is not a weakly prime, because it can be changed into another prime (17712365347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8856182973 + 8856182974.

It is an arithmetic number, because the mean of its divisors is an integer number (8856182974).

Almost surely, 2^17712365947 is an apocalyptic number.

17712365947 is a deficient number, since it is larger than the sum of its proper divisors (1).

17712365947 is an equidigital number, since it uses as much as digits as its factorization.

17712365947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2222640, while the sum is 52.

The spelling of 17712365947 in words is "seventeen billion, seven hundred twelve million, three hundred sixty-five thousand, nine hundred forty-seven".