11381623 has 6 divisors (see below), whose sum is σ = 12510512. Its totient is φ = 10346820.

The previous prime is 11381621. The next prime is 11381633. The reversal of 11381623 is 32618311.

It is not a de Polignac number, because 11381623 - 2¹ = 11381621 is a prime.

It is a super-2 number, since 2×11381623² = 259082684228258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11381621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46911 + ... + 47152.

Almost surely, 2^11381623 is an apocalyptic number.

11381623 is a deficient number, since it is larger than the sum of its proper divisors (1128889).

11381623 is an equidigital number, since it uses as much as digits as its factorization.

11381623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94085 (or 94074 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 11381623 is about 3373.6661067746. Note that the first 3 decimals coincide. The cubic root of 11381623 is about 224.9407119508.

Adding to 11381623 its reverse (32618311), we get a palindrome (43999934).

The spelling of 11381623 in words is "eleven million, three hundred eighty-one thousand, six hundred twenty-three".