8417748921 has 8 divisors (see below), whose sum is σ = 11259072384. Its totient is φ = 5594129040.

The previous prime is 8417748907. The next prime is 8417748931. The reversal of 8417748921 is 1298477148.

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

It is not a de Polignac number, because 8417748921 - 2²³ = 8409360313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8417748931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4424785 + ... + 4426686.

It is an arithmetic number, because the mean of its divisors is an integer number (1407384048).

Almost surely, 2^8417748921 is an apocalyptic number.

It is an amenable number.

8417748921 is a deficient number, since it is larger than the sum of its proper divisors (2841323463).

8417748921 is a wasteful number, since it uses less digits than its factorization.

8417748921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8851791.

The product of its digits is 903168, while the sum is 51.

The square root of 8417748921 is about 91748.2911067013. The cubic root of 8417748921 is about 2034.2234475667.

The spelling of 8417748921 in words is "eight billion, four hundred seventeen million, seven hundred forty-eight thousand, nine hundred twenty-one".