11519381 has 2 divisors, whose sum is σ = 11519382. Its totient is φ = 11519380.

The previous prime is 11519357. The next prime is 11519407. The reversal of 11519381 is 18391511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10176100 + 1343281 = 3190^2 + 1159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11519381 is a prime.

It is a super-2 number, since 2×11519381² = 265392277246322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11519311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5759690 + 5759691.

It is an arithmetic number, because the mean of its divisors is an integer number (5759691).

Almost surely, 2^11519381 is an apocalyptic number.

It is an amenable number.

11519381 is a deficient number, since it is larger than the sum of its proper divisors (1).

11519381 is an equidigital number, since it uses as much as digits as its factorization.

11519381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 29.

The square root of 11519381 is about 3394.0213611585. The cubic root of 11519381 is about 225.8446017111.

The spelling of 11519381 in words is "eleven million, five hundred nineteen thousand, three hundred eighty-one".