9729312899 has 2 divisors, whose sum is σ = 9729312900. Its totient is φ = 9729312898.

The previous prime is 9729312851. The next prime is 9729312937. The reversal of 9729312899 is 9982139279.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9729312899 is a prime.

It is not a weakly prime, because it can be changed into another prime (9729312829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4864656449 + 4864656450.

It is an arithmetic number, because the mean of its divisors is an integer number (4864656450).

Almost surely, 2^9729312899 is an apocalyptic number.

9729312899 is a deficient number, since it is larger than the sum of its proper divisors (1).

9729312899 is an equidigital number, since it uses as much as digits as its factorization.

9729312899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 59.

The square root of 9729312899 is about 98637.2794586307. The cubic root of 9729312899 is about 2134.8173492479.

The spelling of 9729312899 in words is "nine billion, seven hundred twenty-nine million, three hundred twelve thousand, eight hundred ninety-nine".