109259961 has 4 divisors (see below), whose sum is σ = 145679952. Its totient is φ = 72839972.

The previous prime is 109259951. The next prime is 109259971. The reversal of 109259961 is 169952901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 169952901 = 3 ⋅56650967.

It is an interprime number because it is at equal distance from previous prime (109259951) and next prime (109259971).

It is a cyclic number.

It is not a de Polignac number, because 109259961 - 2¹⁷ = 109128889 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (109259951) 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, 18209991 + ... + 18209996.

It is an arithmetic number, because the mean of its divisors is an integer number (36419988).

Almost surely, 2^109259961 is an apocalyptic number.

It is an amenable number.

109259961 is a deficient number, since it is larger than the sum of its proper divisors (36419991).

109259961 is an equidigital number, since it uses as much as digits as its factorization.

109259961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36419990.

The product of its (nonzero) digits is 43740, while the sum is 42.

The square root of 109259961 is about 10452.7489685728. The cubic root of 109259961 is about 478.0650708261.

The spelling of 109259961 in words is "one hundred nine million, two hundred fifty-nine thousand, nine hundred sixty-one".