11957387 has 4 divisors (see below), whose sum is σ = 12877200. Its totient is φ = 11037576.

The previous prime is 11957381. The next prime is 11957453. The reversal of 11957387 is 78375911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78375911 = 61 ⋅1284851.

It is a cyclic number.

It is not a de Polignac number, because 11957387 - 2⁸ = 11957131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11957381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459887 + ... + 459912.

It is an arithmetic number, because the mean of its divisors is an integer number (3219300).

Almost surely, 2^11957387 is an apocalyptic number.

11957387 is a deficient number, since it is larger than the sum of its proper divisors (919813).

11957387 is an equidigital number, since it uses as much as digits as its factorization.

11957387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919812.

The product of its digits is 52920, while the sum is 41.

The square root of 11957387 is about 3457.9454882921. The cubic root of 11957387 is about 228.6715287192.

The spelling of 11957387 in words is "eleven million, nine hundred fifty-seven thousand, three hundred eighty-seven".