9724671117431 has 2 divisors, whose sum is σ = 9724671117432. Its totient is φ = 9724671117430.

The previous prime is 9724671117419. The next prime is 9724671117439. The reversal of 9724671117431 is 1347111764279.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9724671117431 - 2¹⁸ = 9724670855287 is a prime.

It is a super-2 number, since 2×9724671117431² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9724671117439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4862335558715 + 4862335558716.

It is an arithmetic number, because the mean of its divisors is an integer number (4862335558716).

Almost surely, 2^{9724671117431} is an apocalyptic number.

9724671117431 is a deficient number, since it is larger than the sum of its proper divisors (1).

9724671117431 is an equidigital number, since it uses as much as digits as its factorization.

9724671117431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 53.

The spelling of 9724671117431 in words is "nine trillion, seven hundred twenty-four billion, six hundred seventy-one million, one hundred seventeen thousand, four hundred thirty-one".