1109391377 has 2 divisors, whose sum is σ = 1109391378. Its totient is φ = 1109391376.

The previous prime is 1109391341. The next prime is 1109391397. The reversal of 1109391377 is 7731939011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 688485121 + 420906256 = 26239^2 + 20516^2 .

It is a cyclic number.

It is not a de Polignac number, because 1109391377 - 2⁸ = 1109391121 is a prime.

It is a super-2 number, since 2×1109391377² = 2461498454723912258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1109391307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554695688 + 554695689.

It is an arithmetic number, because the mean of its divisors is an integer number (554695689).

Almost surely, 2^1109391377 is an apocalyptic number.

It is an amenable number.

1109391377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109391377 is an equidigital number, since it uses as much as digits as its factorization.

1109391377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35721, while the sum is 41.

The square root of 1109391377 is about 33307.5273324214. The cubic root of 1109391377 is about 1035.2095313530.

The spelling of 1109391377 in words is "one billion, one hundred nine million, three hundred ninety-one thousand, three hundred seventy-seven".