9022891861 has 2 divisors, whose sum is σ = 9022891862. Its totient is φ = 9022891860.

The previous prime is 9022891841. The next prime is 9022891873. The reversal of 9022891861 is 1681982209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7339348900 + 1683542961 = 85670^2 + 41031^2 .

It is an emirp because it is prime and its reverse (1681982209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9022891861 - 2²⁵ = 8989337429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9022891841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4511445930 + 4511445931.

It is an arithmetic number, because the mean of its divisors is an integer number (4511445931).

Almost surely, 2^9022891861 is an apocalyptic number.

It is an amenable number.

9022891861 is a deficient number, since it is larger than the sum of its proper divisors (1).

9022891861 is an equidigital number, since it uses as much as digits as its factorization.

9022891861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 9022891861 is about 94988.9038835589. The cubic root of 9022891861 is about 2081.8459221182.

The spelling of 9022891861 in words is "nine billion, twenty-two million, eight hundred ninety-one thousand, eight hundred sixty-one".