13739906 has 4 divisors (see below), whose sum is σ = 20609862. Its totient is φ = 6869952.

The previous prime is 13739897. The next prime is 13739923. The reversal of 13739906 is 60993731.

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., 13256881 + 483025 = 3641^2 + 695^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13739906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3434975 + ... + 3434978.

Almost surely, 2^13739906 is an apocalyptic number.

13739906 is a deficient number, since it is larger than the sum of its proper divisors (6869956).

13739906 is an equidigital number, since it uses as much as digits as its factorization.

13739906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6869955.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 13739906 is about 3706.7379189794. The cubic root of 13739906 is about 239.5123547540.

The spelling of 13739906 in words is "thirteen million, seven hundred thirty-nine thousand, nine hundred six".