13977851 has 4 divisors (see below), whose sum is σ = 13985400. Its totient is φ = 13970304.

The previous prime is 13977829. The next prime is 13977853. The reversal of 13977851 is 15877931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 15877931 = 1447 ⋅10973.

It is a cyclic number.

It is not a de Polignac number, because 13977851 - 2²² = 9783547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13977799 and 13977808.

It is not an unprimeable number, because it can be changed into a prime (13977853) 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, 1115 + ... + 5403.

It is an arithmetic number, because the mean of its divisors is an integer number (3496350).

Almost surely, 2^13977851 is an apocalyptic number.

13977851 is a deficient number, since it is larger than the sum of its proper divisors (7549).

13977851 is an equidigital number, since it uses as much as digits as its factorization.

13977851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7548.

The product of its digits is 52920, while the sum is 41.

The square root of 13977851 is about 3738.6964305758. The cubic root of 13977851 is about 240.8870587573.

The spelling of 13977851 in words is "thirteen million, nine hundred seventy-seven thousand, eight hundred fifty-one".