2836021861 has 2 divisors, whose sum is σ = 2836021862. Its totient is φ = 2836021860.

The previous prime is 2836021847. The next prime is 2836021873. The reversal of 2836021861 is 1681206382.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2301024961 + 534996900 = 47969^2 + 23130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2836021861 - 2⁵ = 2836021829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2836021861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2836021801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1418010930 + 1418010931.

It is an arithmetic number, because the mean of its divisors is an integer number (1418010931).

Almost surely, 2^2836021861 is an apocalyptic number.

It is an amenable number.

2836021861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2836021861 is an equidigital number, since it uses as much as digits as its factorization.

2836021861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 2836021861 is about 53254.3130741539. The cubic root of 2836021861 is about 1415.4782204932.

The spelling of 2836021861 in words is "two billion, eight hundred thirty-six million, twenty-one thousand, eight hundred sixty-one".