1081540717 has 2 divisors, whose sum is σ = 1081540718. Its totient is φ = 1081540716.

The previous prime is 1081540639. The next prime is 1081540721. The reversal of 1081540717 is 7170451801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 643433956 + 438106761 = 25366^2 + 20931^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081540717 - 2²⁷ = 947322989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081540777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540770358 + 540770359.

It is an arithmetic number, because the mean of its divisors is an integer number (540770359).

Almost surely, 2^1081540717 is an apocalyptic number.

It is an amenable number.

1081540717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081540717 is an equidigital number, since it uses as much as digits as its factorization.

1081540717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 34.

The square root of 1081540717 is about 32886.7863586578. The cubic root of 1081540717 is about 1026.4732230387.

The spelling of 1081540717 in words is "one billion, eighty-one million, five hundred forty thousand, seven hundred seventeen".