105398999 has 2 divisors, whose sum is σ = 105399000. Its totient is φ = 105398998.

The previous prime is 105398981. The next prime is 105399001. The reversal of 105398999 is 999893501.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105398999 is a prime.

It is a super-2 number, since 2×105398999² = 22217897980404002, which contains 22 as substring.

Together with 105399001, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 105398999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105398599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52699499 + 52699500.

It is an arithmetic number, because the mean of its divisors is an integer number (52699500).

Almost surely, 2^105398999 is an apocalyptic number.

105398999 is a deficient number, since it is larger than the sum of its proper divisors (1).

105398999 is an equidigital number, since it uses as much as digits as its factorization.

105398999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 787320, while the sum is 53.

The square root of 105398999 is about 10266.4014630249. The cubic root of 105398999 is about 472.3662157747.

The spelling of 105398999 in words is "one hundred five million, three hundred ninety-eight thousand, nine hundred ninety-nine".