109991263 has 2 divisors, whose sum is σ = 109991264. Its totient is φ = 109991262.

The previous prime is 109991257. The next prime is 109991303. The reversal of 109991263 is 362199901.

It is an a-pointer prime, because the next prime (109991303) can be obtained adding 109991263 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109991263 - 2²⁵ = 76436831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109991213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54995631 + 54995632.

It is an arithmetic number, because the mean of its divisors is an integer number (54995632).

Almost surely, 2^109991263 is an apocalyptic number.

109991263 is a deficient number, since it is larger than the sum of its proper divisors (1).

109991263 is an equidigital number, since it uses as much as digits as its factorization.

109991263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 109991263 is about 10487.6719532983. The cubic root of 109991263 is about 479.1292997233.

The spelling of 109991263 in words is "one hundred nine million, nine hundred ninety-one thousand, two hundred sixty-three".