100000399 has 2 divisors, whose sum is σ = 100000400. Its totient is φ = 100000398.

The previous prime is 100000393. The next prime is 100000421. The reversal of 100000399 is 993000001.

It is an a-pointer prime, because the next prime (100000421) can be obtained adding 100000399 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100000399 - 2²³ = 91611791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100000393) 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, 50000199 + 50000200.

It is an arithmetic number, because the mean of its divisors is an integer number (50000200).

Almost surely, 2^100000399 is an apocalyptic number.

100000399 is a deficient number, since it is larger than the sum of its proper divisors (1).

100000399 is an equidigital number, since it uses as much as digits as its factorization.

100000399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 100000399 is about 10000.0199499801. The cubic root of 100000399 is about 464.1595006918.

The spelling of 100000399 in words is "one hundred million, three hundred ninety-nine", and thus it is an aban number.