11387779 has 4 divisors (see below), whose sum is σ = 12263776. Its totient is φ = 10511784.

The previous prime is 11387777. The next prime is 11387797. The reversal of 11387779 is 97778311.

11387779 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97778311 = 7417 ⋅13183.

It is a cyclic number.

It is not a de Polignac number, because 11387779 - 2¹ = 11387777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11387777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437979 + ... + 438004.

It is an arithmetic number, because the mean of its divisors is an integer number (3065944).

Almost surely, 2^11387779 is an apocalyptic number.

11387779 is a deficient number, since it is larger than the sum of its proper divisors (875997).

11387779 is an equidigital number, since it uses as much as digits as its factorization.

11387779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875996.

The product of its digits is 74088, while the sum is 43.

The square root of 11387779 is about 3374.5783440306. The cubic root of 11387779 is about 224.9812593445.

The spelling of 11387779 in words is "eleven million, three hundred eighty-seven thousand, seven hundred seventy-nine".