1081918417 has 2 divisors, whose sum is σ = 1081918418. Its totient is φ = 1081918416.

The previous prime is 1081918393. The next prime is 1081918429. The reversal of 1081918417 is 7148191801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 996096721 + 85821696 = 31561^2 + 9264^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081918417 - 2⁷ = 1081918289 is a prime.

It is a super-2 number, since 2×1081918417² = 2341094922087571778, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1081918417.

It is not a weakly prime, because it can be changed into another prime (1081918477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540959208 + 540959209.

It is an arithmetic number, because the mean of its divisors is an integer number (540959209).

Almost surely, 2^1081918417 is an apocalyptic number.

It is an amenable number.

1081918417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081918417 is an equidigital number, since it uses as much as digits as its factorization.

1081918417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 40.

The square root of 1081918417 is about 32892.5282853112. The cubic root of 1081918417 is about 1026.5926988346.

The spelling of 1081918417 in words is "one billion, eighty-one million, nine hundred eighteen thousand, four hundred seventeen".