3621981133 has 2 divisors, whose sum is σ = 3621981134. Its totient is φ = 3621981132.

The previous prime is 3621981107. The next prime is 3621981157. The reversal of 3621981133 is 3311891263.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2924862724 + 697118409 = 54082^2 + 26403^2 .

It is a cyclic number.

It is not a de Polignac number, because 3621981133 - 2²⁵ = 3588426701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3621981092 and 3621981101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3621981173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810990566 + 1810990567.

It is an arithmetic number, because the mean of its divisors is an integer number (1810990567).

Almost surely, 2^3621981133 is an apocalyptic number.

It is an amenable number.

3621981133 is a deficient number, since it is larger than the sum of its proper divisors (1).

3621981133 is an equidigital number, since it uses as much as digits as its factorization.

3621981133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 3621981133 is about 60182.8973463392. The cubic root of 3621981133 is about 1535.7318614977.

The spelling of 3621981133 in words is "three billion, six hundred twenty-one million, nine hundred eighty-one thousand, one hundred thirty-three".