2002945991 has 6 divisors (see below), whose sum is σ = 2069642376. Its totient is φ = 1938333900.

The previous prime is 2002945969. The next prime is 2002946017. The reversal of 2002945991 is 1995492002.

It is a happy number.

It is not a de Polignac number, because 2002945991 - 2⁶ = 2002945927 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 (2002945391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1041155 + ... + 1043076.

It is an arithmetic number, because the mean of its divisors is an integer number (344940396).

Almost surely, 2^2002945991 is an apocalyptic number.

2002945991 is a deficient number, since it is larger than the sum of its proper divisors (66696385).

2002945991 is an equidigital number, since it uses as much as digits as its factorization.

2002945991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084293 (or 2084262 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 2002945991 is about 44754.2846105264. The cubic root of 2002945991 is about 1260.5393657476.

The spelling of 2002945991 in words is "two billion, two million, nine hundred forty-five thousand, nine hundred ninety-one".