13402739 has 8 divisors (see below), whose sum is σ = 15341568. Its totient is φ = 11469960.

The previous prime is 13402729. The next prime is 13402751. The reversal of 13402739 is 93720431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13402739 - 2²⁰ = 12354163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13402709) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 5294 + ... + 7404.

It is an arithmetic number, because the mean of its divisors is an integer number (1917696).

Almost surely, 2^13402739 is an apocalyptic number.

13402739 is a deficient number, since it is larger than the sum of its proper divisors (1938829).

13402739 is an equidigital number, since it uses as much as digits as its factorization.

13402739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 13402739 is about 3660.9751433191. The cubic root of 13402739 is about 237.5369560220.

It can be divided in two parts, 13402 and 739, that added together give a palindrome (14141).

The spelling of 13402739 in words is "thirteen million, four hundred two thousand, seven hundred thirty-nine".