9739257497 has 2 divisors, whose sum is σ = 9739257498. Its totient is φ = 9739257496.

The previous prime is 9739257457. The next prime is 9739257529. The reversal of 9739257497 is 7947529379.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8416044121 + 1323213376 = 91739^2 + 36376^2 .

It is a cyclic number.

It is not a de Polignac number, because 9739257497 - 2¹⁰ = 9739256473 is a prime.

It is not a weakly prime, because it can be changed into another prime (9739257457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4869628748 + 4869628749.

It is an arithmetic number, because the mean of its divisors is an integer number (4869628749).

Almost surely, 2^9739257497 is an apocalyptic number.

It is an amenable number.

9739257497 is a deficient number, since it is larger than the sum of its proper divisors (1).

9739257497 is an equidigital number, since it uses as much as digits as its factorization.

9739257497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30005640, while the sum is 62.

The square root of 9739257497 is about 98687.6765204248. The cubic root of 9739257497 is about 2135.5444533934.

The spelling of 9739257497 in words is "nine billion, seven hundred thirty-nine million, two hundred fifty-seven thousand, four hundred ninety-seven".