13878877 has 4 divisors (see below), whose sum is σ = 13886460. Its totient is φ = 13871296.

The previous prime is 13878859. The next prime is 13878881. The reversal of 13878877 is 77887831.

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: 77887831 = 7 ⋅11126833.

It can be written as a sum of positive squares in 2 ways, for example, as 13461561 + 417316 = 3669^2 + 646^2 .

It is a cyclic number.

It is not a de Polignac number, because 13878877 - 2¹⁹ = 13354589 is a prime.

It is a super-2 number, since 2×13878877² = 385246453562258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13878877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13872877) 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, 843 + ... + 5335.

It is an arithmetic number, because the mean of its divisors is an integer number (3471615).

Almost surely, 2^13878877 is an apocalyptic number.

It is an amenable number.

13878877 is a deficient number, since it is larger than the sum of its proper divisors (7583).

13878877 is an equidigital number, since it uses as much as digits as its factorization.

13878877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7582.

The product of its digits is 526848, while the sum is 49.

The square root of 13878877 is about 3725.4364844941. The cubic root of 13878877 is about 240.3171559307.

The spelling of 13878877 in words is "thirteen million, eight hundred seventy-eight thousand, eight hundred seventy-seven".