13643494 has 4 divisors (see below), whose sum is σ = 20465244. Its totient is φ = 6821746.

The previous prime is 13643467. The next prime is 13643527. The reversal of 13643494 is 49434631.

13643494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×13643494² = 372289857056072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3410872 + ... + 3410875.

It is an arithmetic number, because the mean of its divisors is an integer number (5116311).

Almost surely, 2^13643494 is an apocalyptic number.

13643494 is a deficient number, since it is larger than the sum of its proper divisors (6821750).

13643494 is an equidigital number, since it uses as much as digits as its factorization.

13643494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821749.

The product of its digits is 31104, while the sum is 34.

The square root of 13643494 is about 3693.7100590057. The cubic root of 13643494 is about 238.9508252441.

The spelling of 13643494 in words is "thirteen million, six hundred forty-three thousand, four hundred ninety-four".