11954991 has 16 divisors (see below), whose sum is σ = 16386560. Its totient is φ = 7750080.

The previous prime is 11954977. The next prime is 11955007. The reversal of 11954991 is 19945911.

It is not a de Polignac number, because 11954991 - 2⁹ = 11954479 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 (11954941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16956 + ... + 17646.

It is an arithmetic number, because the mean of its divisors is an integer number (1024160).

Almost surely, 2^11954991 is an apocalyptic number.

11954991 is a deficient number, since it is larger than the sum of its proper divisors (4431569).

11954991 is an equidigital number, since it uses as much as digits as its factorization.

11954991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846.

The product of its digits is 14580, while the sum is 39.

The square root of 11954991 is about 3457.5990224432. The cubic root of 11954991 is about 228.6562541004.

The spelling of 11954991 in words is "eleven million, nine hundred fifty-four thousand, nine hundred ninety-one".