2001229903 has 4 divisors (see below), whose sum is σ = 2002897408. Its totient is φ = 1999562400.

The previous prime is 2001229897. The next prime is 2001229913. The reversal of 2001229903 is 3099221002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3099221002 = 2 ⋅1549610501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001229903 is a prime.

It is a super-2 number, since 2×2001229903² = 8009842249322778818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001229913) 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, 831951 + ... + 834352.

It is an arithmetic number, because the mean of its divisors is an integer number (500724352).

Almost surely, 2^2001229903 is an apocalyptic number.

2001229903 is a deficient number, since it is larger than the sum of its proper divisors (1667505).

2001229903 is a wasteful number, since it uses less digits than its factorization.

2001229903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667504.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 2001229903 is about 44735.1081702056. The cubic root of 2001229903 is about 1260.1792604196.

The spelling of 2001229903 in words is "two billion, one million, two hundred twenty-nine thousand, nine hundred three".