13776961 has 4 divisors (see below), whose sum is σ = 15029424. Its totient is φ = 12524500.

The previous prime is 13776949. The next prime is 13777003. The reversal of 13776961 is 16967731.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16967731 = 11 ⋅1542521.

It is a cyclic number.

It is not a de Polignac number, because 13776961 - 2⁵ = 13776929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13776901) 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, 626215 + ... + 626236.

It is an arithmetic number, because the mean of its divisors is an integer number (3757356).

Almost surely, 2^13776961 is an apocalyptic number.

13776961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13776961 is a deficient number, since it is larger than the sum of its proper divisors (1252463).

13776961 is a wasteful number, since it uses less digits than its factorization.

13776961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252462.

The product of its digits is 47628, while the sum is 40.

The square root of 13776961 is about 3711.7328837081. The cubic root of 13776961 is about 239.7274742224.

It can be divided in two parts, 1377 and 6961, that added together give a palindrome (8338).

The spelling of 13776961 in words is "thirteen million, seven hundred seventy-six thousand, nine hundred sixty-one".