13406657 has 4 divisors (see below), whose sum is σ = 14625456. Its totient is φ = 12187860.

The previous prime is 13406651. The next prime is 13406711. The reversal of 13406657 is 75660431.

13406657 is digitally balanced in base 3, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13406657 - 2¹⁰ = 13405633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13406651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609383 + ... + 609404.

It is an arithmetic number, because the mean of its divisors is an integer number (3656364).

Almost surely, 2^13406657 is an apocalyptic number.

It is an amenable number.

13406657 is a deficient number, since it is larger than the sum of its proper divisors (1218799).

13406657 is a wasteful number, since it uses less digits than its factorization.

13406657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218798.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 13406657 is about 3661.5102075510. The cubic root of 13406657 is about 237.5601000257.

It can be divided in two parts, 1340 and 6657, that added together give a palindrome (7997).

The spelling of 13406657 in words is "thirteen million, four hundred six thousand, six hundred fifty-seven".