8190090061 has 2 divisors, whose sum is σ = 8190090062. Its totient is φ = 8190090060.

The previous prime is 8190090059. The next prime is 8190090089. The reversal of 8190090061 is 1600900918.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8178489225 + 11600836 = 90435^2 + 3406^2 .

It is a cyclic number.

It is not a de Polignac number, because 8190090061 - 2¹ = 8190090059 is a prime.

Together with 8190090059, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 8190089999 and 8190090026.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8190093061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4095045030 + 4095045031.

It is an arithmetic number, because the mean of its divisors is an integer number (4095045031).

Almost surely, 2^8190090061 is an apocalyptic number.

It is an amenable number.

8190090061 is a deficient number, since it is larger than the sum of its proper divisors (1).

8190090061 is an equidigital number, since it uses as much as digits as its factorization.

8190090061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 8190090061 is about 90499.1163548021. The cubic root of 8190090061 is about 2015.7170027884.

Adding to 8190090061 its reverse (1600900918), we get a palindrome (9790990979).

The spelling of 8190090061 in words is "eight billion, one hundred ninety million, ninety thousand, sixty-one".