11899549 has 2 divisors, whose sum is σ = 11899550. Its totient is φ = 11899548.

The previous prime is 11899523. The next prime is 11899583. The reversal of 11899549 is 94599811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9703225 + 2196324 = 3115^2 + 1482^2 .

It is a cyclic number.

It is not a de Polignac number, because 11899549 - 2¹³ = 11891357 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11899499 and 11899508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11899049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5949774 + 5949775.

It is an arithmetic number, because the mean of its divisors is an integer number (5949775).

Almost surely, 2^11899549 is an apocalyptic number.

It is an amenable number.

11899549 is a deficient number, since it is larger than the sum of its proper divisors (1).

11899549 is an equidigital number, since it uses as much as digits as its factorization.

11899549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 46.

The square root of 11899549 is about 3449.5722923284. The cubic root of 11899549 is about 228.3022371681.

The spelling of 11899549 in words is "eleven million, eight hundred ninety-nine thousand, five hundred forty-nine".