11387311 has 4 divisors (see below), whose sum is σ = 12263272. Its totient is φ = 10511352.

The previous prime is 11387309. The next prime is 11387333. The reversal of 11387311 is 11378311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11387311 - 2¹ = 11387309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11327311) 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, 437961 + ... + 437986.

It is an arithmetic number, because the mean of its divisors is an integer number (3065818).

Almost surely, 2^11387311 is an apocalyptic number.

11387311 is a deficient number, since it is larger than the sum of its proper divisors (875961).

11387311 is an equidigital number, since it uses as much as digits as its factorization.

11387311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875960.

The product of its digits is 504, while the sum is 25.

The square root of 11387311 is about 3374.5090013215. The cubic root of 11387311 is about 224.9781773074.

The spelling of 11387311 in words is "eleven million, three hundred eighty-seven thousand, three hundred eleven".