919081 has 2 divisors, whose sum is σ = 919082. Its totient is φ = 919080.

The previous prime is 919067. The next prime is 919109. The reversal of 919081 is 180919.

It is an a-pointer prime, because the next prime (919109) can be obtained adding 919081 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 912025 + 7056 = 955^2 + 84^2 .

It is a cyclic number.

It is not a de Polignac number, because 919081 - 2¹⁵ = 886313 is a prime.

It is a super-2 number, since 2×919081² = 1689419769122, which contains 22 as substring.

919081 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (919021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459540 + 459541.

It is an arithmetic number, because the mean of its divisors is an integer number (459541).

2⁹¹⁹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

919081 is a deficient number, since it is larger than the sum of its proper divisors (1).

919081 is an equidigital number, since it uses as much as digits as its factorization.

919081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 919081 is about 958.6871231012. The cubic root of 919081 is about 97.2264874440.

The spelling of 919081 in words is "nine hundred nineteen thousand, eighty-one".