11950991 has 8 divisors (see below), whose sum is σ = 13063344. Its totient is φ = 10866240.

The previous prime is 11950979. The next prime is 11951011. The reversal of 11950991 is 19905911.

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 11950991 - 2¹⁰ = 11949967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11950901) 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, 5990 + ... + 7731.

It is an arithmetic number, because the mean of its divisors is an integer number (1632918).

Almost surely, 2^11950991 is an apocalyptic number.

11950991 is a deficient number, since it is larger than the sum of its proper divisors (1112353).

11950991 is a wasteful number, since it uses less digits than its factorization.

11950991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13801.

The product of its (nonzero) digits is 3645, while the sum is 35.

The square root of 11950991 is about 3457.0205379778. The cubic root of 11950991 is about 228.6307493540.

The spelling of 11950991 in words is "eleven million, nine hundred fifty thousand, nine hundred ninety-one".