11977903 has 16 divisors (see below), whose sum is σ = 14284800. Its totient is φ = 10034808.

The previous prime is 11977891. The next prime is 11977907. The reversal of 11977903 is 30977911.

It is a de Polignac number, because none of the positive numbers 2^k-11977903 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 (11977907) 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, 15750 + ... + 16492.

It is an arithmetic number, because the mean of its divisors is an integer number (892800).

Almost surely, 2^11977903 is an apocalyptic number.

11977903 is a deficient number, since it is larger than the sum of its proper divisors (2306897).

11977903 is an frugal number, since it uses more digits than its factorization.

11977903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 11977903 is about 3460.9107182937. The cubic root of 11977903 is about 228.8022357741.

It can be divided in two parts, 11977 and 903, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 11977903 in words is "eleven million, nine hundred seventy-seven thousand, nine hundred three".