9917408827 has 2 divisors, whose sum is σ = 9917408828. Its totient is φ = 9917408826.

The previous prime is 9917408819. The next prime is 9917408857. The reversal of 9917408827 is 7288047199.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9917408827 - 2³ = 9917408819 is a prime.

It is not a weakly prime, because it can be changed into another prime (9917408807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4958704413 + 4958704414.

It is an arithmetic number, because the mean of its divisors is an integer number (4958704414).

Almost surely, 2^9917408827 is an apocalyptic number.

9917408827 is a deficient number, since it is larger than the sum of its proper divisors (1).

9917408827 is an equidigital number, since it uses as much as digits as its factorization.

9917408827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 55.

The square root of 9917408827 is about 99586.1879328655. The cubic root of 9917408827 is about 2148.4870428094.

The spelling of 9917408827 in words is "nine billion, nine hundred seventeen million, four hundred eight thousand, eight hundred twenty-seven".