99478331 has 2 divisors, whose sum is σ = 99478332. Its totient is φ = 99478330.

The previous prime is 99478321. The next prime is 99478333. The reversal of 99478331 is 13387499.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13387499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99478331 - 2¹⁰ = 99477307 is a prime.

It is a super-2 number, since 2×99478331² = 19791876677091122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 99478333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99478333) 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 as a sum of consecutive naturals, namely, 49739165 + 49739166.

It is an arithmetic number, because the mean of its divisors is an integer number (49739166).

Almost surely, 2^99478331 is an apocalyptic number.

99478331 is a deficient number, since it is larger than the sum of its proper divisors (1).

99478331 is an equidigital number, since it uses as much as digits as its factorization.

99478331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 99478331 is about 9973.8824436625. The cubic root of 99478331 is about 463.3503514386.

The spelling of 99478331 in words is "ninety-nine million, four hundred seventy-eight thousand, three hundred thirty-one".