13109775 has 24 divisors (see below), whose sum is σ = 24772224. Its totient is φ = 5992800.

The previous prime is 13109749. The next prime is 13109779. The reversal of 13109775 is 57790131.

13109775 = 182² + 183² + ... + 356².

It is not a de Polignac number, because 13109775 - 2⁹ = 13109263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13109779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11961 + ... + 13010.

It is an arithmetic number, because the mean of its divisors is an integer number (1032176).

Almost surely, 2^13109775 is an apocalyptic number.

13109775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13109775 is a deficient number, since it is larger than the sum of its proper divisors (11662449).

13109775 is a wasteful number, since it uses less digits than its factorization.

13109775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24991 (or 24986 counting only the distinct ones).

The product of its (nonzero) digits is 6615, while the sum is 33.

The square root of 13109775 is about 3620.7423272031. The cubic root of 13109775 is about 235.7934549754.

The spelling of 13109775 in words is "thirteen million, one hundred nine thousand, seven hundred seventy-five".