1165380217 has 2 divisors, whose sum is σ = 1165380218. Its totient is φ = 1165380216.

The previous prime is 1165380193. The next prime is 1165380221. The reversal of 1165380217 is 7120835611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 646634041 + 518746176 = 25429^2 + 22776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1165380217 is a prime.

It is a super-2 number, since 2×1165380217² = 2716222100349934178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1165380247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582690108 + 582690109.

It is an arithmetic number, because the mean of its divisors is an integer number (582690109).

Almost surely, 2^1165380217 is an apocalyptic number.

It is an amenable number.

1165380217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165380217 is an equidigital number, since it uses as much as digits as its factorization.

1165380217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1165380217 is about 34137.6656641898. The cubic root of 1165380217 is about 1052.3395202199.

The spelling of 1165380217 in words is "one billion, one hundred sixty-five million, three hundred eighty thousand, two hundred seventeen".