109673945 has 4 divisors (see below), whose sum is σ = 131608740. Its totient is φ = 87739152.

The previous prime is 109673917. The next prime is 109673989. The reversal of 109673945 is 549376901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549376901 = 43 ⋅12776207.

It can be written as a sum of positive squares in 2 ways, for example, as 42237001 + 67436944 = 6499^2 + 8212^2 .

It is a cyclic number.

It is not a de Polignac number, because 109673945 - 2⁶ = 109673881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 109673896 and 109673905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10967390 + ... + 10967399.

It is an arithmetic number, because the mean of its divisors is an integer number (32902185).

Almost surely, 2^109673945 is an apocalyptic number.

It is an amenable number.

109673945 is a deficient number, since it is larger than the sum of its proper divisors (21934795).

109673945 is an equidigital number, since it uses as much as digits as its factorization.

109673945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21934794.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 109673945 is about 10472.5328836915. The cubic root of 109673945 is about 478.6681031188.

The spelling of 109673945 in words is "one hundred nine million, six hundred seventy-three thousand, nine hundred forty-five".