915005081 has 2 divisors, whose sum is σ = 915005082. Its totient is φ = 915005080.

The previous prime is 915005057. The next prime is 915005089. The reversal of 915005081 is 180500519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 802305625 + 112699456 = 28325^2 + 10616^2 .

It is an emirp because it is prime and its reverse (180500519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 915005081 - 2⁶ = 915005017 is a prime.

It is a super-2 number, since 2×915005081² = 1674468596511633122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (915005089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457502540 + 457502541.

It is an arithmetic number, because the mean of its divisors is an integer number (457502541).

Almost surely, 2^915005081 is an apocalyptic number.

It is an amenable number.

915005081 is a deficient number, since it is larger than the sum of its proper divisors (1).

915005081 is an equidigital number, since it uses as much as digits as its factorization.

915005081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 915005081 is about 30249.0509107311. The cubic root of 915005081 is about 970.8254853465.

The spelling of 915005081 in words is "nine hundred fifteen million, five thousand, eighty-one".