109517143 has 4 divisors (see below), whose sum is σ = 111312568. Its totient is φ = 107721720.

The previous prime is 109517113. The next prime is 109517153. The reversal of 109517143 is 341715901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341715901 = 167 ⋅2046203.

It is a cyclic number.

It is not a de Polignac number, because 109517143 - 2¹⁷ = 109386071 is a prime.

It is a super-2 number, since 2×109517143² = 23988009221764898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109517113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 897621 + ... + 897742.

It is an arithmetic number, because the mean of its divisors is an integer number (27828142).

Almost surely, 2^109517143 is an apocalyptic number.

109517143 is a deficient number, since it is larger than the sum of its proper divisors (1795425).

109517143 is an equidigital number, since it uses as much as digits as its factorization.

109517143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795424.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 109517143 is about 10465.0438603954. The cubic root of 109517143 is about 478.4398753665.

The spelling of 109517143 in words is "one hundred nine million, five hundred seventeen thousand, one hundred forty-three".