1990324903 has 8 divisors (see below), whose sum is σ = 2291261472. Its totient is φ = 1693539456.

The previous prime is 1990324883. The next prime is 1990324907. The reversal of 1990324903 is 3094230991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1990324903 is a prime.

It is a super-2 number, since 2×1990324903² = 7922786439003918818, 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 (1990324907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1036750 + ... + 1038667.

It is an arithmetic number, because the mean of its divisors is an integer number (286407684).

Almost surely, 2^1990324903 is an apocalyptic number.

1990324903 is a deficient number, since it is larger than the sum of its proper divisors (300936569).

1990324903 is a wasteful number, since it uses less digits than its factorization.

1990324903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2075561.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 1990324903 is about 44613.0575392452. The cubic root of 1990324903 is about 1257.8861219429.

The spelling of 1990324903 in words is "one billion, nine hundred ninety million, three hundred twenty-four thousand, nine hundred three".