1002143997 has 6 divisors (see below), whose sum is σ = 1447541342. Its totient is φ = 668095992.

The previous prime is 1002143983. The next prime is 1002144007. The reversal of 1002143997 is 7993412001.

It can be written as a sum of positive squares in only one way, i.e., 992817081 + 9326916 = 31509^2 + 3054^2 .

It is not a de Polignac number, because 1002143997 - 2¹¹ = 1002141949 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 (1002143297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55674658 + ... + 55674675.

Almost surely, 2^1002143997 is an apocalyptic number.

It is an amenable number.

1002143997 is a deficient number, since it is larger than the sum of its proper divisors (445397345).

1002143997 is a wasteful number, since it uses less digits than its factorization.

1002143997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111349339 (or 111349336 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1002143997 is about 31656.6580200753. The cubic root of 1002143997 is about 1000.7141555271.

Adding to 1002143997 its reverse (7993412001), we get a palindrome (8995555998).

The spelling of 1002143997 in words is "one billion, two million, one hundred forty-three thousand, nine hundred ninety-seven".