181413394 has 16 divisors (see below), whose sum is σ = 274229208. Its totient is φ = 90006912.

The previous prime is 181413389. The next prime is 181413403. The reversal of 181413394 is 493314181.

It can be written as a sum of positive squares in 4 ways, for example, as 132595225 + 48818169 = 11515^2 + 6987^2 .

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, 175102 + ... + 176134.

Almost surely, 2^181413394 is an apocalyptic number.

181413394 is a deficient number, since it is larger than the sum of its proper divisors (92815814).

181413394 is a wasteful number, since it uses less digits than its factorization.

181413394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629.

The product of its digits is 10368, while the sum is 34.

The square root of 181413394 is about 13468.9789516503. The cubic root of 181413394 is about 566.0956045556.

The spelling of 181413394 in words is "one hundred eighty-one million, four hundred thirteen thousand, three hundred ninety-four".