2002610861 has 2 divisors, whose sum is σ = 2002610862. Its totient is φ = 2002610860.

The previous prime is 2002610837. The next prime is 2002610873. The reversal of 2002610861 is 1680162002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1830213961 + 172396900 = 42781^2 + 13130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002610861 - 2²² = 1998416557 is a prime.

It is a super-2 number, since 2×2002610861² = 8020900521190322642, 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 2002610861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002610821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001305430 + 1001305431.

It is an arithmetic number, because the mean of its divisors is an integer number (1001305431).

Almost surely, 2^2002610861 is an apocalyptic number.

It is an amenable number.

2002610861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002610861 is an equidigital number, since it uses as much as digits as its factorization.

2002610861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2002610861 is about 44750.5403431065. The cubic root of 2002610861 is about 1260.4690579572.

Adding to 2002610861 its reverse (1680162002), we get a palindrome (3682772863).

The spelling of 2002610861 in words is "two billion, two million, six hundred ten thousand, eight hundred sixty-one".