11939749 has 2 divisors, whose sum is σ = 11939750. Its totient is φ = 11939748.

The previous prime is 11939747. The next prime is 11939773. The reversal of 11939749 is 94793911.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11902500 + 37249 = 3450^2 + 193^2 .

It is a cyclic number.

It is not a de Polignac number, because 11939749 - 2¹ = 11939747 is a prime.

Together with 11939747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11939747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5969874 + 5969875.

It is an arithmetic number, because the mean of its divisors is an integer number (5969875).

Almost surely, 2^11939749 is an apocalyptic number.

It is an amenable number.

11939749 is a deficient number, since it is larger than the sum of its proper divisors (1).

11939749 is an equidigital number, since it uses as much as digits as its factorization.

11939749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236, while the sum is 43.

The square root of 11939749 is about 3455.3941888010. The cubic root of 11939749 is about 228.5590377770.

The spelling of 11939749 in words is "eleven million, nine hundred thirty-nine thousand, seven hundred forty-nine".