1001868813 has 48 divisors (see below), whose sum is σ = 1604116800. Its totient is φ = 597507840.

The previous prime is 1001868811. The next prime is 1001868823. The reversal of 1001868813 is 3188681001.

It is not a de Polignac number, because 1001868813 - 2¹ = 1001868811 is a prime.

It is a super-2 number, since 2×1001868813² = 2007482236924057938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001868811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2449353 + ... + 2449761.

It is an arithmetic number, because the mean of its divisors is an integer number (33419100).

Almost surely, 2^1001868813 is an apocalyptic number.

It is an amenable number.

1001868813 is a deficient number, since it is larger than the sum of its proper divisors (602247987).

1001868813 is a wasteful number, since it uses less digits than its factorization.

1001868813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1001868813 is about 31652.3113374047. The cubic root of 1001868813 is about 1000.6225500177.

The spelling of 1001868813 in words is "one billion, one million, eight hundred sixty-eight thousand, eight hundred thirteen".