11879857 has 4 divisors (see below), whose sum is σ = 12959856. Its totient is φ = 10799860.

The previous prime is 11879843. The next prime is 11879867. The reversal of 11879857 is 75897811.

11879857 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, and also an emirpimes, since its reverse is a distinct semiprime: 75897811 = 11 ⋅6899801.

It is a cyclic number.

It is not a de Polignac number, because 11879857 - 2¹¹ = 11877809 is a prime.

It is a super-2 number, since 2×11879857² = 282262004680898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11879867) 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, 539983 + ... + 540004.

It is an arithmetic number, because the mean of its divisors is an integer number (3239964).

Almost surely, 2^11879857 is an apocalyptic number.

It is an amenable number.

11879857 is a deficient number, since it is larger than the sum of its proper divisors (1079999).

11879857 is a wasteful number, since it uses less digits than its factorization.

11879857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079998.

The product of its digits is 141120, while the sum is 46.

The square root of 11879857 is about 3446.7168436064. The cubic root of 11879857 is about 228.1762321164.

The spelling of 11879857 in words is "eleven million, eight hundred seventy-nine thousand, eight hundred fifty-seven".