2002785391 has 2 divisors, whose sum is σ = 2002785392. Its totient is φ = 2002785390.

The previous prime is 2002785377. The next prime is 2002785403. The reversal of 2002785391 is 1935872002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2002785391 - 2⁷ = 2002785263 is a prime.

It is a super-2 number, since 2×2002785391² = 8022298644806045762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2002785391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002785311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001392695 + 1001392696.

It is an arithmetic number, because the mean of its divisors is an integer number (1001392696).

Almost surely, 2^2002785391 is an apocalyptic number.

2002785391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002785391 is an equidigital number, since it uses as much as digits as its factorization.

2002785391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 2002785391 is about 44752.4903329412. The cubic root of 2002785391 is about 1260.5056740365.

The spelling of 2002785391 in words is "two billion, two million, seven hundred eighty-five thousand, three hundred ninety-one".