1109780317 has 2 divisors, whose sum is σ = 1109780318. Its totient is φ = 1109780316.

The previous prime is 1109780267. The next prime is 1109780341. The reversal of 1109780317 is 7130879011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 658897561 + 450882756 = 25669^2 + 21234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1109780317 is a prime.

It is a super-2 number, since 2×1109780317² = 2463224704001240978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1109780017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554890158 + 554890159.

It is an arithmetic number, because the mean of its divisors is an integer number (554890159).

Almost surely, 2^1109780317 is an apocalyptic number.

It is an amenable number.

1109780317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109780317 is an equidigital number, since it uses as much as digits as its factorization.

1109780317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 37.

The square root of 1109780317 is about 33313.3654409158. The cubic root of 1109780317 is about 1035.3304947808.

The spelling of 1109780317 in words is "one billion, one hundred nine million, seven hundred eighty thousand, three hundred seventeen".