3890222681 has 2 divisors, whose sum is σ = 3890222682. Its totient is φ = 3890222680.

The previous prime is 3890222669. The next prime is 3890222689. The reversal of 3890222681 is 1862220983.

3890222681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3331136656 + 559086025 = 57716^2 + 23645^2 .

It is a cyclic number.

It is not a de Polignac number, because 3890222681 - 2⁶ = 3890222617 is a prime.

It is a super-2 number, since 2×3890222681² = 30267665015533655522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3890222689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1945111340 + 1945111341.

It is an arithmetic number, because the mean of its divisors is an integer number (1945111341).

Almost surely, 2^3890222681 is an apocalyptic number.

It is an amenable number.

3890222681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3890222681 is an equidigital number, since it uses as much as digits as its factorization.

3890222681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 3890222681 is about 62371.6496575167. The cubic root of 3890222681 is about 1572.7444230703.

The spelling of 3890222681 in words is "three billion, eight hundred ninety million, two hundred twenty-two thousand, six hundred eighty-one".