11738591 has 4 divisors (see below), whose sum is σ = 12143400. Its totient is φ = 11333784.

The previous prime is 11738539. The next prime is 11738593. The reversal of 11738591 is 19583711.

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 11738591 - 2¹⁸ = 11476447 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 (11738593) 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, 202361 + ... + 202418.

It is an arithmetic number, because the mean of its divisors is an integer number (3035850).

Almost surely, 2^11738591 is an apocalyptic number.

11738591 is a deficient number, since it is larger than the sum of its proper divisors (404809).

11738591 is an equidigital number, since it uses as much as digits as its factorization.

11738591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404808.

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

The square root of 11738591 is about 3426.1627223470. The cubic root of 11738591 is about 227.2681920113.

The spelling of 11738591 in words is "eleven million, seven hundred thirty-eight thousand, five hundred ninety-one".