9917427 has 24 divisors (see below), whose sum is σ = 14803968. Its totient is φ = 5896800.

The previous prime is 9917419. The next prime is 9917429. The reversal of 9917427 is 7247199.

9917427 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9917427 - 2³ = 9917419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (9917429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15402 + ... + 16032.

It is an arithmetic number, because the mean of its divisors is an integer number (616832).

Almost surely, 2^9917427 is an apocalyptic number.

9917427 is a deficient number, since it is larger than the sum of its proper divisors (4886541).

9917427 is a wasteful number, since it uses less digits than its factorization.

9917427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 678 counting only the distinct ones).

The product of its digits is 31752, while the sum is 39.

The square root of 9917427 is about 3149.1946589565. The cubic root of 9917427 is about 214.8488355129.

The spelling of 9917427 in words is "nine million, nine hundred seventeen thousand, four hundred twenty-seven".