99903406 has 16 divisors (see below), whose sum is σ = 158034960.
Its totient is φ = 47234880.
The previous prime is 99903403. The next prime is 99903409. The reversal of 99903406 is 60430999.
It is an interprime number because it is at equal distance from previous prime (99903403) and next prime (99903409).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (99903403) 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 in 7 ways as a sum of consecutive naturals, for example, 21316 + ... + 25576.
It is an arithmetic number, because the mean of its divisors is an integer number (9877185).
Almost surely, 299903406 is an apocalyptic number.
99903406 is the 6322-nd centered pentagonal number.
99903406 is a deficient number, since it is larger than the sum of its proper divisors (58131554).
99903406 is a wasteful number, since it uses less digits than its factorization.
99903406 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4899.
The product of its (nonzero) digits is 52488, while the sum is 40.
The square root of 99903406 is about 9995.1691331363.
The cubic root of 99903406 is about 464.0093853383.
The spelling of 99903406 in words is "ninety-nine million, nine hundred three thousand, four hundred six".