9999997493 has 2 divisors, whose sum is σ = 9999997494. Its totient is φ = 9999997492.

The previous prime is 9999997417. The next prime is 9999997519. The reversal of 9999997493 is 3947999999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7386027364 + 2613970129 = 85942^2 + 51127^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999997493 - 2⁸ = 9999997237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999997393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999998746 + 4999998747.

It is an arithmetic number, because the mean of its divisors is an integer number (4999998747).

Almost surely, 2^9999997493 is an apocalyptic number.

It is an amenable number.

9999997493 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999997493 is an equidigital number, since it uses as much as digits as its factorization.

9999997493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 401769396, while the sum is 77.

The square root of 9999997493 is about 99999.9874649992. The cubic root of 9999997493 is about 2154.4345099929.

The spelling of 9999997493 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-seven thousand, four hundred ninety-three".