11931906 has 16 divisors (see below), whose sum is σ = 27273024. Its totient is φ = 3409104.

The previous prime is 11931901. The next prime is 11931919. The reversal of 11931906 is 60913911.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11931901) 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, 142005 + ... + 142088.

It is an arithmetic number, because the mean of its divisors is an integer number (1704564).

Almost surely, 2^11931906 is an apocalyptic number.

11931906 is an abundant number, since it is smaller than the sum of its proper divisors (15341118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11931906 is a wasteful number, since it uses less digits than its factorization.

11931906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284105.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 11931906 is about 3454.2591101421. The cubic root of 11931906 is about 228.5089814153.

The spelling of 11931906 in words is "eleven million, nine hundred thirty-one thousand, nine hundred six".