13144394 has 4 divisors (see below), whose sum is σ = 19716594. Its totient is φ = 6572196.

The previous prime is 13144393. The next prime is 13144423. The reversal of 13144394 is 49344131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7360369 + 5784025 = 2713^2 + 2405^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13144393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3286097 + ... + 3286100.

Almost surely, 2^13144394 is an apocalyptic number.

13144394 is a deficient number, since it is larger than the sum of its proper divisors (6572200).

13144394 is an equidigital number, since it uses as much as digits as its factorization.

13144394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6572199.

The product of its digits is 5184, while the sum is 29.

The square root of 13144394 is about 3625.5198247975. The cubic root of 13144394 is about 236.0008259092. Note that the first 3 decimals are identical.

The spelling of 13144394 in words is "thirteen million, one hundred forty-four thousand, three hundred ninety-four".