9912392729 has 2 divisors, whose sum is σ = 9912392730. Its totient is φ = 9912392728.

The previous prime is 9912392713. The next prime is 9912392761. The reversal of 9912392729 is 9272932199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9865058329 + 47334400 = 99323^2 + 6880^2 .

It is an emirp because it is prime and its reverse (9272932199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9912392729 - 2⁴ = 9912392713 is a prime.

It is a super-2 number, since 2×9912392729² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9912392779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4956196364 + 4956196365.

It is an arithmetic number, because the mean of its divisors is an integer number (4956196365).

Almost surely, 2^9912392729 is an apocalyptic number.

It is an amenable number.

9912392729 is a deficient number, since it is larger than the sum of its proper divisors (1).

9912392729 is an equidigital number, since it uses as much as digits as its factorization.

9912392729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102248, while the sum is 53.

The square root of 9912392729 is about 99561.0000401764. Note that the first 4 decimals coincide. The cubic root of 9912392729 is about 2148.1247560059.

The spelling of 9912392729 in words is "nine billion, nine hundred twelve million, three hundred ninety-two thousand, seven hundred twenty-nine".