1002001403 has 32 divisors (see below), whose sum is σ = 1180299456. Its totient is φ = 842047488.

The previous prime is 1002001387. The next prime is 1002001409. The reversal of 1002001403 is 3041002001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1002001403 - 2⁴ = 1002001387 is a prime.

It is a super-2 number, since 2×1002001403² = 2008013623227936818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002001409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2313875 + ... + 2314307.

It is an arithmetic number, because the mean of its divisors is an integer number (36884358).

Almost surely, 2^1002001403 is an apocalyptic number.

1002001403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1002001403 is a deficient number, since it is larger than the sum of its proper divisors (178298053).

1002001403 is a wasteful number, since it uses less digits than its factorization.

1002001403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1002001403 is about 31654.4057439087. The cubic root of 1002001403 is about 1000.6666897593. Note that the first 4 decimals are identical.

Adding to 1002001403 its reverse (3041002001), we get a palindrome (4043003404).

The spelling of 1002001403 in words is "one billion, two million, one thousand, four hundred three".