11953949 has 4 divisors (see below), whose sum is σ = 13661664. Its totient is φ = 10246236.

The previous prime is 11953937. The next prime is 11953961. The reversal of 11953949 is 94935911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (11953937) and next prime (11953961).

It is a de Polignac number, because none of the positive numbers 2^k-11953949 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 (11953999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853847 + ... + 853860.

It is an arithmetic number, because the mean of its divisors is an integer number (3415416).

Almost surely, 2^11953949 is an apocalyptic number.

It is an amenable number.

11953949 is a deficient number, since it is larger than the sum of its proper divisors (1707715).

11953949 is an equidigital number, since it uses as much as digits as its factorization.

11953949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707714.

The product of its digits is 43740, while the sum is 41.

The square root of 11953949 is about 3457.4483365627. The cubic root of 11953949 is about 228.6496106620.

The spelling of 11953949 in words is "eleven million, nine hundred fifty-three thousand, nine hundred forty-nine".