923665081 has 2 divisors, whose sum is σ = 923665082. Its totient is φ = 923665080.

The previous prime is 923665033. The next prime is 923665117. The reversal of 923665081 is 180566329.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654541056 + 269124025 = 25584^2 + 16405^2 .

It is a cyclic number.

It is not a de Polignac number, because 923665081 - 2⁷ = 923664953 is a prime.

It is a super-2 number, since 2×923665081² = 1706314363717473122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (923665381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 461832540 + 461832541.

It is an arithmetic number, because the mean of its divisors is an integer number (461832541).

Almost surely, 2^923665081 is an apocalyptic number.

It is an amenable number.

923665081 is a deficient number, since it is larger than the sum of its proper divisors (1).

923665081 is an equidigital number, since it uses as much as digits as its factorization.

923665081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 923665081 is about 30391.8587947496. The cubic root of 923665081 is about 973.8786427849.

The spelling of 923665081 in words is "nine hundred twenty-three million, six hundred sixty-five thousand, eighty-one".