13665494 has 4 divisors (see below), whose sum is σ = 20498244. Its totient is φ = 6832746.

The previous prime is 13665493. The next prime is 13665497. The reversal of 13665494 is 49456631.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13665493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3416372 + ... + 3416375.

It is an arithmetic number, because the mean of its divisors is an integer number (5124561).

Almost surely, 2^13665494 is an apocalyptic number.

13665494 is a deficient number, since it is larger than the sum of its proper divisors (6832750).

13665494 is an equidigital number, since it uses as much as digits as its factorization.

13665494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6832749.

The product of its digits is 77760, while the sum is 38.

The square root of 13665494 is about 3696.6868950453. The cubic root of 13665494 is about 239.0791915581.

The spelling of 13665494 in words is "thirteen million, six hundred sixty-five thousand, four hundred ninety-four".