181874345 has 8 divisors (see below), whose sum is σ = 218395464. Its totient is φ = 145401984.

The previous prime is 181874339. The next prime is 181874359. The reversal of 181874345 is 543478181.

It can be written as a sum of positive squares in 4 ways, for example, as 26822041 + 155052304 = 5179^2 + 12452^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 181874345 - 2⁸ = 181874089 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3404 + ... + 19373.

It is an arithmetic number, because the mean of its divisors is an integer number (27299433).

Almost surely, 2^181874345 is an apocalyptic number.

It is an amenable number.

181874345 is a deficient number, since it is larger than the sum of its proper divisors (36521119).

181874345 is a wasteful number, since it uses less digits than its factorization.

181874345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24379.

The product of its digits is 107520, while the sum is 41.

The square root of 181874345 is about 13486.0796749834. The cubic root of 181874345 is about 566.5746607641.

The spelling of 181874345 in words is "one hundred eighty-one million, eight hundred seventy-four thousand, three hundred forty-five".