9125085881 has 2 divisors, whose sum is σ = 9125085882. Its totient is φ = 9125085880.

The previous prime is 9125085847. The next prime is 9125085889. The reversal of 9125085881 is 1885805219.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8116388281 + 1008697600 = 90091^2 + 31760^2 .

It is an emirp because it is prime and its reverse (1885805219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9125085881 - 2¹⁸ = 9124823737 is a prime.

It is a super-2 number, since 2×9125085881² (a number of 21 digits) 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 (9125085889) 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, 4562542940 + 4562542941.

It is an arithmetic number, because the mean of its divisors is an integer number (4562542941).

Almost surely, 2^9125085881 is an apocalyptic number.

It is an amenable number.

9125085881 is a deficient number, since it is larger than the sum of its proper divisors (1).

9125085881 is an equidigital number, since it uses as much as digits as its factorization.

9125085881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 47.

The square root of 9125085881 is about 95525.3153933553. The cubic root of 9125085881 is about 2089.6761538930.

The spelling of 9125085881 in words is "nine billion, one hundred twenty-five million, eighty-five thousand, eight hundred eighty-one".