11929881 has 8 divisors (see below), whose sum is σ = 15966720. Its totient is φ = 7923152.

The previous prime is 11929871. The next prime is 11929889. The reversal of 11929881 is 18892911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11929881 - 2⁵ = 11929849 is a prime.

It is a super-2 number, since 2×11929881² = 284644121348322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11929889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6585 + ... + 8198.

It is an arithmetic number, because the mean of its divisors is an integer number (1995840).

Almost surely, 2^11929881 is an apocalyptic number.

It is an amenable number.

11929881 is a deficient number, since it is larger than the sum of its proper divisors (4036839).

11929881 is a wasteful number, since it uses less digits than its factorization.

11929881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15055.

The product of its digits is 10368, while the sum is 39.

The square root of 11929881 is about 3453.9659813032. The cubic root of 11929881 is about 228.4960536996.

The spelling of 11929881 in words is "eleven million, nine hundred twenty-nine thousand, eight hundred eighty-one".