99478417 has 2 divisors, whose sum is σ = 99478418. Its totient is φ = 99478416.

The previous prime is 99478399. The next prime is 99478429. The reversal of 99478417 is 71487499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64064016 + 35414401 = 8004^2 + 5951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99478417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99478117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49739208 + 49739209.

It is an arithmetic number, because the mean of its divisors is an integer number (49739209).

Almost surely, 2^99478417 is an apocalyptic number.

It is an amenable number.

99478417 is a deficient number, since it is larger than the sum of its proper divisors (1).

99478417 is an equidigital number, since it uses as much as digits as its factorization.

99478417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 49.

The square root of 99478417 is about 9973.8867549216. The cubic root of 99478417 is about 463.3504849622.

The spelling of 99478417 in words is "ninety-nine million, four hundred seventy-eight thousand, four hundred seventeen".