109391563 has 2 divisors, whose sum is σ = 109391564. Its totient is φ = 109391562.

The previous prime is 109391521. The next prime is 109391599. The reversal of 109391563 is 365193901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109391563 - 2¹³ = 109383371 is a prime.

It is not a weakly prime, because it can be changed into another prime (109391663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54695781 + 54695782.

It is an arithmetic number, because the mean of its divisors is an integer number (54695782).

Almost surely, 2^109391563 is an apocalyptic number.

109391563 is a deficient number, since it is larger than the sum of its proper divisors (1).

109391563 is an equidigital number, since it uses as much as digits as its factorization.

109391563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21870, while the sum is 37.

The square root of 109391563 is about 10459.0421645579. The cubic root of 109391563 is about 478.2569345731.

The spelling of 109391563 in words is "one hundred nine million, three hundred ninety-one thousand, five hundred sixty-three".