11381957 has 4 divisors (see below), whose sum is σ = 11397036. Its totient is φ = 11366880.

The previous prime is 11381921. The next prime is 11381963. The reversal of 11381957 is 75918311.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1653796 + 9728161 = 1286^2 + 3119^2 .

It is a cyclic number.

It is not a de Polignac number, because 11381957 - 2¹⁰ = 11380933 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 (11389957) 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, 6344 + ... + 7937.

It is an arithmetic number, because the mean of its divisors is an integer number (2849259).

Almost surely, 2^11381957 is an apocalyptic number.

It is an amenable number.

11381957 is a deficient number, since it is larger than the sum of its proper divisors (15079).

11381957 is an equidigital number, since it uses as much as digits as its factorization.

11381957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15078.

The product of its digits is 7560, while the sum is 35.

The square root of 11381957 is about 3373.7156074572. The cubic root of 11381957 is about 224.9429122657.

The spelling of 11381957 in words is "eleven million, three hundred eighty-one thousand, nine hundred fifty-seven".