11139761 has 2 divisors, whose sum is σ = 11139762. Its totient is φ = 11139760.

The previous prime is 11139721. The next prime is 11139763. The reversal of 11139761 is 16793111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10523536 + 616225 = 3244^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 11139761 - 2¹⁸ = 10877617 is a prime.

Together with 11139763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11139763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5569880 + 5569881.

It is an arithmetic number, because the mean of its divisors is an integer number (5569881).

Almost surely, 2^11139761 is an apocalyptic number.

It is an amenable number.

11139761 is a deficient number, since it is larger than the sum of its proper divisors (1).

11139761 is an equidigital number, since it uses as much as digits as its factorization.

11139761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134, while the sum is 29.

The square root of 11139761 is about 3337.6280499780. The cubic root of 11139761 is about 223.3359438818.

The spelling of 11139761 in words is "eleven million, one hundred thirty-nine thousand, seven hundred sixty-one".