1081918433 has 2 divisors, whose sum is σ = 1081918434. Its totient is φ = 1081918432.

The previous prime is 1081918429. The next prime is 1081918469. The reversal of 1081918433 is 3348191801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 816130624 + 265787809 = 28568^2 + 16303^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081918433 - 2² = 1081918429 is a prime.

It is not a weakly prime, because it can be changed into another prime (1081918483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540959216 + 540959217.

It is an arithmetic number, because the mean of its divisors is an integer number (540959217).

Almost surely, 2^1081918433 is an apocalyptic number.

It is an amenable number.

1081918433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081918433 is an equidigital number, since it uses as much as digits as its factorization.

1081918433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1081918433 is about 32892.5285285276. The cubic root of 1081918433 is about 1026.5927038952.

The spelling of 1081918433 in words is "one billion, eighty-one million, nine hundred eighteen thousand, four hundred thirty-three".