13708621 has 4 divisors (see below), whose sum is σ = 14304672. Its totient is φ = 13112572.

The previous prime is 13708589. The next prime is 13708649. The reversal of 13708621 is 12680731.

13708621 is digitally balanced in base 2 and base 3, because in such bases 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, and also an emirpimes, since its reverse is a distinct semiprime: 12680731 = 7 ⋅1811533.

It is a cyclic number.

It is not a de Polignac number, because 13708621 - 2⁵ = 13708589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13708621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13708661) 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, 297991 + ... + 298036.

It is an arithmetic number, because the mean of its divisors is an integer number (3576168).

Almost surely, 2^13708621 is an apocalyptic number.

It is an amenable number.

13708621 is a deficient number, since it is larger than the sum of its proper divisors (596051).

13708621 is an equidigital number, since it uses as much as digits as its factorization.

13708621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596050.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 13708621 is about 3702.5154962539. The cubic root of 13708621 is about 239.3304311809.

The spelling of 13708621 in words is "thirteen million, seven hundred eight thousand, six hundred twenty-one".