9731143139 has 2 divisors, whose sum is σ = 9731143140. Its totient is φ = 9731143138.

The previous prime is 9731143087. The next prime is 9731143159. The reversal of 9731143139 is 9313411379.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9731143139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9731143096 and 9731143105.

It is not a weakly prime, because it can be changed into another prime (9731143159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4865571569 + 4865571570.

It is an arithmetic number, because the mean of its divisors is an integer number (4865571570).

Almost surely, 2^9731143139 is an apocalyptic number.

9731143139 is a deficient number, since it is larger than the sum of its proper divisors (1).

9731143139 is an equidigital number, since it uses as much as digits as its factorization.

9731143139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 41.

The square root of 9731143139 is about 98646.5566504985. The cubic root of 9731143139 is about 2134.9512053303.

The spelling of 9731143139 in words is "nine billion, seven hundred thirty-one million, one hundred forty-three thousand, one hundred thirty-nine".