11487139 has 4 divisors (see below), whose sum is σ = 11498760. Its totient is φ = 11475520.

The previous prime is 11487137. The next prime is 11487163. The reversal of 11487139 is 93178411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93178411 = 17 ⋅5481083.

It is a cyclic number.

It is not a de Polignac number, because 11487139 - 2¹ = 11487137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11487137) 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, 4174 + ... + 6355.

It is an arithmetic number, because the mean of its divisors is an integer number (2874690).

Almost surely, 2^11487139 is an apocalyptic number.

11487139 is a deficient number, since it is larger than the sum of its proper divisors (11621).

11487139 is a wasteful number, since it uses less digits than its factorization.

11487139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11620.

The product of its digits is 6048, while the sum is 34.

The square root of 11487139 is about 3389.2682101008. The cubic root of 11487139 is about 225.6336966898.

The spelling of 11487139 in words is "eleven million, four hundred eighty-seven thousand, one hundred thirty-nine".