13709641 has 4 divisors (see below), whose sum is σ = 14955984. Its totient is φ = 12463300.

The previous prime is 13709629. The next prime is 13709651. The reversal of 13709641 is 14690731.

It is a happy number.

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 13709641 - 2⁷ = 13709513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13709611) 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, 623155 + ... + 623176.

It is an arithmetic number, because the mean of its divisors is an integer number (3738996).

Almost surely, 2^13709641 is an apocalyptic number.

13709641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13709641 is a deficient number, since it is larger than the sum of its proper divisors (1246343).

13709641 is a wasteful number, since it uses less digits than its factorization.

13709641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246342.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 13709641 is about 3702.6532378823. The cubic root of 13709641 is about 239.3363668857.

It can be divided in two parts, 1370 and 9641, that added together give a palindrome (11011).

The spelling of 13709641 in words is "thirteen million, seven hundred nine thousand, six hundred forty-one".