99143903 has 4 divisors (see below), whose sum is σ = 100540368. Its totient is φ = 97747440.

The previous prime is 99143897. The next prime is 99143909. The reversal of 99143903 is 30934199.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (99143897) and next prime (99143909).

It is a cyclic number.

It is not a de Polignac number, because 99143903 - 2⁴ = 99143887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99143909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698126 + ... + 698267.

It is an arithmetic number, because the mean of its divisors is an integer number (25135092).

Almost surely, 2^99143903 is an apocalyptic number.

99143903 is a deficient number, since it is larger than the sum of its proper divisors (1396465).

99143903 is a wasteful number, since it uses less digits than its factorization.

99143903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396464.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 99143903 is about 9957.1031429829. The cubic root of 99143903 is about 462.8305353778.

The spelling of 99143903 in words is "ninety-nine million, one hundred forty-three thousand, nine hundred three".