13773861 has 16 divisors (see below), whose sum is σ = 20742720. Its totient is φ = 9030960.

The previous prime is 13773847. The next prime is 13773899. The reversal of 13773861 is 16837731.

It is not a de Polignac number, because 13773861 - 2⁶ = 13773797 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13777861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2535 + ... + 5828.

It is an arithmetic number, because the mean of its divisors is an integer number (1296420).

Almost surely, 2^13773861 is an apocalyptic number.

It is an amenable number.

13773861 is a deficient number, since it is larger than the sum of its proper divisors (6968859).

13773861 is an equidigital number, since it uses as much as digits as its factorization.

13773861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8433 (or 8427 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 13773861 is about 3711.3152655090. The cubic root of 13773861 is about 239.7094922471.

The spelling of 13773861 in words is "thirteen million, seven hundred seventy-three thousand, eight hundred sixty-one".