13861949 has 4 divisors (see below), whose sum is σ = 13904160. Its totient is φ = 13819740.

The previous prime is 13861943. The next prime is 13861973. The reversal of 13861949 is 94916831.

13861949 is digitally balanced in base 2, 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 13861949 - 2⁴ = 13861933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13861943) 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, 20609 + ... + 21270.

It is an arithmetic number, because the mean of its divisors is an integer number (3476040).

Almost surely, 2^13861949 is an apocalyptic number.

It is an amenable number.

13861949 is a deficient number, since it is larger than the sum of its proper divisors (42211).

13861949 is an equidigital number, since it uses as much as digits as its factorization.

13861949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42210.

The product of its digits is 46656, while the sum is 41.

The square root of 13861949 is about 3723.1638427552. The cubic root of 13861949 is about 240.2194116180.

The spelling of 13861949 in words is "thirteen million, eight hundred sixty-one thousand, nine hundred forty-nine".