11900543 has 2 divisors, whose sum is σ = 11900544. Its totient is φ = 11900542.

The previous prime is 11900531. The next prime is 11900557. The reversal of 11900543 is 34500911.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11900543 - 2²² = 7706239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11900503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5950271 + 5950272.

It is an arithmetic number, because the mean of its divisors is an integer number (5950272).

Almost surely, 2^11900543 is an apocalyptic number.

11900543 is a deficient number, since it is larger than the sum of its proper divisors (1).

11900543 is an equidigital number, since it uses as much as digits as its factorization.

11900543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 11900543 is about 3449.7163651524. The cubic root of 11900543 is about 228.3085938825.

The spelling of 11900543 in words is "eleven million, nine hundred thousand, five hundred forty-three".