9217893997 has 8 divisors (see below), whose sum is σ = 9936263960. Its totient is φ = 8500852800.

The previous prime is 9217893991. The next prime is 9217894009. The reversal of 9217893997 is 7993987129.

It can be written as a sum of positive squares in 4 ways, for example, as 35271721 + 9182622276 = 5939^2 + 95826^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9217893997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9217893991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317754 + ... + 345547.

It is an arithmetic number, because the mean of its divisors is an integer number (1242032995).

Almost surely, 2^9217893997 is an apocalyptic number.

It is an amenable number.

9217893997 is a deficient number, since it is larger than the sum of its proper divisors (718369963).

9217893997 is a wasteful number, since it uses less digits than its factorization.

9217893997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664383.

The product of its digits is 15431472, while the sum is 64.

The square root of 9217893997 is about 96009.8640609391. The cubic root of 9217893997 is about 2096.7367304234.

The spelling of 9217893997 in words is "nine billion, two hundred seventeen million, eight hundred ninety-three thousand, nine hundred ninety-seven".