9992917409 has 4 divisors (see below), whose sum is σ = 9994625940. Its totient is φ = 9991208880.

The previous prime is 9992917397. The next prime is 9992917423. The reversal of 9992917409 is 9047192999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1389798400 + 8603119009 = 37280^2 + 92753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9992917409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9992917499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845462 + ... + 857199.

It is an arithmetic number, because the mean of its divisors is an integer number (2498656485).

Almost surely, 2^9992917409 is an apocalyptic number.

It is an amenable number.

9992917409 is a deficient number, since it is larger than the sum of its proper divisors (1708531).

9992917409 is a wasteful number, since it uses less digits than its factorization.

9992917409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708530.

The product of its (nonzero) digits is 3306744, while the sum is 59.

The square root of 9992917409 is about 99964.5807723916. The cubic root of 9992917409 is about 2153.9259372452.

The spelling of 9992917409 in words is "nine billion, nine hundred ninety-two million, nine hundred seventeen thousand, four hundred nine".