109643381 has 4 divisors (see below), whose sum is σ = 109752000. Its totient is φ = 109534764.

The previous prime is 109643377. The next prime is 109643393. The reversal of 109643381 is 183346901.

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: 183346901 = 103 ⋅1780067.

It is a cyclic number.

It is not a de Polignac number, because 109643381 - 2² = 109643377 is a prime.

It is a super-2 number, since 2×109643381² = 24043341994222322, 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 (109643341) 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, 52781 + ... + 54818.

It is an arithmetic number, because the mean of its divisors is an integer number (27438000).

Almost surely, 2^109643381 is an apocalyptic number.

It is an amenable number.

109643381 is a deficient number, since it is larger than the sum of its proper divisors (108619).

109643381 is a wasteful number, since it uses less digits than its factorization.

109643381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108618.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 109643381 is about 10471.0735361757. The cubic root of 109643381 is about 478.6236338174.

The spelling of 109643381 in words is "one hundred nine million, six hundred forty-three thousand, three hundred eighty-one".