11949311 has 4 divisors (see below), whose sum is σ = 13035624. Its totient is φ = 10863000.

The previous prime is 11949307. The next prime is 11949331. The reversal of 11949311 is 11394911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11949311 - 2² = 11949307 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 (11949331) 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, 543140 + ... + 543161.

It is an arithmetic number, because the mean of its divisors is an integer number (3258906).

Almost surely, 2^11949311 is an apocalyptic number.

11949311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11949311 is a deficient number, since it is larger than the sum of its proper divisors (1086313).

11949311 is a wasteful number, since it uses less digits than its factorization.

11949311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086312.

The product of its digits is 972, while the sum is 29.

The square root of 11949311 is about 3456.7775456341. Note that the first 3 decimals coincide. The cubic root of 11949311 is about 228.6200356634.

The spelling of 11949311 in words is "eleven million, nine hundred forty-nine thousand, three hundred eleven".