109203257 has 4 divisors (see below), whose sum is σ = 115626996. Its totient is φ = 102779520.

The previous prime is 109203253. The next prime is 109203301. The reversal of 109203257 is 752302901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752302901 = 7 ⋅107471843.

It can be written as a sum of positive squares in 2 ways, for example, as 50282281 + 58920976 = 7091^2 + 7676^2 .

It is a cyclic number.

It is not a de Polignac number, because 109203257 - 2² = 109203253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109203253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3211844 + ... + 3211877.

It is an arithmetic number, because the mean of its divisors is an integer number (28906749).

Almost surely, 2^109203257 is an apocalyptic number.

109203257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

109203257 is a deficient number, since it is larger than the sum of its proper divisors (6423739).

109203257 is an equidigital number, since it uses as much as digits as its factorization.

109203257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6423738.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 109203257 is about 10450.0362200329. The cubic root of 109203257 is about 477.9823540576.

The spelling of 109203257 in words is "one hundred nine million, two hundred three thousand, two hundred fifty-seven".