11990975 has 6 divisors (see below), whose sum is σ = 14868840. Its totient is φ = 9592760.

The previous prime is 11990971. The next prime is 11990987. The reversal of 11990975 is 57909911.

It is a happy number.

It is not a de Polignac number, because 11990975 - 2² = 11990971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11990971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 239795 + ... + 239844.

It is an arithmetic number, because the mean of its divisors is an integer number (2478140).

Almost surely, 2^11990975 is an apocalyptic number.

11990975 is a deficient number, since it is larger than the sum of its proper divisors (2877865).

11990975 is an equidigital number, since it uses as much as digits as its factorization.

11990975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479649 (or 479644 counting only the distinct ones).

The product of its (nonzero) digits is 25515, while the sum is 41.

The square root of 11990975 is about 3462.7987235761. The cubic root of 11990975 is about 228.8854394159.

The spelling of 11990975 in words is "eleven million, nine hundred ninety thousand, nine hundred seventy-five".