11543997 has 16 divisors (see below), whose sum is σ = 16058880. Its totient is φ = 7368000.

The previous prime is 11543993. The next prime is 11544007. The reversal of 11543997 is 79934511.

It is a happy number.

11543997 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11543997 - 2² = 11543993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11543993) 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, 8779 + ... + 10007.

It is an arithmetic number, because the mean of its divisors is an integer number (1003680).

Almost surely, 2^11543997 is an apocalyptic number.

It is an amenable number.

11543997 is a deficient number, since it is larger than the sum of its proper divisors (4514883).

11543997 is a wasteful number, since it uses less digits than its factorization.

11543997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364.

The product of its digits is 34020, while the sum is 39.

The square root of 11543997 is about 3397.6458026110. The cubic root of 11543997 is about 226.0053579015.

It can be divided in two parts, 1154 and 3997, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 11543997 in words is "eleven million, five hundred forty-three thousand, nine hundred ninety-seven".