11977911 has 36 divisors (see below), whose sum is σ = 20167056. Its totient is φ = 6821760.

The previous prime is 11977907. The next prime is 11977937.

11977911 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 11977911 - 2² = 11977907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11973911) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18190 + ... + 18836.

It is an arithmetic number, because the mean of its divisors is an integer number (560196).

Almost surely, 2^11977911 is an apocalyptic number.

11977911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11977911 is a deficient number, since it is larger than the sum of its proper divisors (8189145).

11977911 is a wasteful number, since it uses less digits than its factorization.

11977911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692 (or 678 counting only the distinct ones).

The product of its digits is 3969, while the sum is 36.

The square root of 11977911 is about 3460.9118740586. The cubic root of 11977911 is about 228.8022867128.

The spelling of 11977911 in words is "eleven million, nine hundred seventy-seven thousand, nine hundred eleven".