4220989261 has 2 divisors, whose sum is σ = 4220989262. Its totient is φ = 4220989260.

The previous prime is 4220989249. The next prime is 4220989291. The reversal of 4220989261 is 1629890224.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3968370025 + 252619236 = 62995^2 + 15894^2 .

It is a cyclic number.

It is not a de Polignac number, because 4220989261 - 2⁷ = 4220989133 is a prime.

It is a super-2 number, since 2×4220989261² = 35633500682954652242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4220989291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110494630 + 2110494631.

It is an arithmetic number, because the mean of its divisors is an integer number (2110494631).

Almost surely, 2^4220989261 is an apocalyptic number.

It is an amenable number.

4220989261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4220989261 is an equidigital number, since it uses as much as digits as its factorization.

4220989261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 4220989261 is about 64969.1408362462. The cubic root of 4220989261 is about 1616.1118538654. Note that the first 3 decimals are identical.

The spelling of 4220989261 in words is "four billion, two hundred twenty million, nine hundred eighty-nine thousand, two hundred sixty-one".