11139649 has 2 divisors, whose sum is σ = 11139650. Its totient is φ = 11139648.

The previous prime is 11139647. The next prime is 11139671. The reversal of 11139649 is 94693111.

It is a happy number.

11139649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11122225 + 17424 = 3335^2 + 132^2 .

It is a cyclic number.

It is not a de Polignac number, because 11139649 - 2¹ = 11139647 is a prime.

Together with 11139647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11139647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5569824 + 5569825.

It is an arithmetic number, because the mean of its divisors is an integer number (5569825).

Almost surely, 2^11139649 is an apocalyptic number.

It is an amenable number.

11139649 is a deficient number, since it is larger than the sum of its proper divisors (1).

11139649 is an equidigital number, since it uses as much as digits as its factorization.

11139649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 34.

The square root of 11139649 is about 3337.6112715534. The cubic root of 11139649 is about 223.3351954004.

The spelling of 11139649 in words is "eleven million, one hundred thirty-nine thousand, six hundred forty-nine".