9497172491 has 2 divisors, whose sum is σ = 9497172492. Its totient is φ = 9497172490.

The previous prime is 9497172457. The next prime is 9497172521. The reversal of 9497172491 is 1942717949.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1942717949) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9497172491 - 2⁶ = 9497172427 is a prime.

It is not a weakly prime, because it can be changed into another prime (9497175491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4748586245 + 4748586246.

It is an arithmetic number, because the mean of its divisors is an integer number (4748586246).

Almost surely, 2^9497172491 is an apocalyptic number.

9497172491 is a deficient number, since it is larger than the sum of its proper divisors (1).

9497172491 is an equidigital number, since it uses as much as digits as its factorization.

9497172491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 53.

The square root of 9497172491 is about 97453.4375535312. The cubic root of 9497172491 is about 2117.7016514654.

The spelling of 9497172491 in words is "nine billion, four hundred ninety-seven million, one hundred seventy-two thousand, four hundred ninety-one".