2001909193 has 4 divisors (see below), whose sum is σ = 2009136580. Its totient is φ = 1994681808.

The previous prime is 2001909139. The next prime is 2001909197. The reversal of 2001909193 is 3919091002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1113690384 + 888218809 = 33372^2 + 29803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001909193 is a prime.

It is a super-2 number, since 2×2001909193² = 8015280834035822498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001909197) 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, 3613278 + ... + 3613831.

It is an arithmetic number, because the mean of its divisors is an integer number (502284145).

Almost surely, 2^2001909193 is an apocalyptic number.

It is an amenable number.

2001909193 is a deficient number, since it is larger than the sum of its proper divisors (7227387).

2001909193 is an equidigital number, since it uses as much as digits as its factorization.

2001909193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7227386.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 2001909193 is about 44742.6998850092. The cubic root of 2001909193 is about 1260.3218278030.

The spelling of 2001909193 in words is "two billion, one million, nine hundred nine thousand, one hundred ninety-three".