1081668737 has 2 divisors, whose sum is σ = 1081668738. Its totient is φ = 1081668736.

The previous prime is 1081668713. The next prime is 1081668751. The reversal of 1081668737 is 7378661801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 808890481 + 272778256 = 28441^2 + 16516^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081668737 - 2¹⁸ = 1081406593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1081668691 and 1081668700.

It is not a weakly prime, because it can be changed into another prime (1081667737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540834368 + 540834369.

It is an arithmetic number, because the mean of its divisors is an integer number (540834369).

Almost surely, 2^1081668737 is an apocalyptic number.

It is an amenable number.

1081668737 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081668737 is an equidigital number, since it uses as much as digits as its factorization.

1081668737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 1081668737 is about 32888.7326754924. The cubic root of 1081668737 is about 1026.5137220279.

The spelling of 1081668737 in words is "one billion, eighty-one million, six hundred sixty-eight thousand, seven hundred thirty-seven".