11381507 has 2 divisors, whose sum is σ = 11381508. Its totient is φ = 11381506.

The previous prime is 11381479. The next prime is 11381521. The reversal of 11381507 is 70518311.

11381507 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (70518311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11381507 - 2⁶ = 11381443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11381537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5690753 + 5690754.

It is an arithmetic number, because the mean of its divisors is an integer number (5690754).

Almost surely, 2^11381507 is an apocalyptic number.

11381507 is a deficient number, since it is larger than the sum of its proper divisors (1).

11381507 is an equidigital number, since it uses as much as digits as its factorization.

11381507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 11381507 is about 3373.6489147509. The cubic root of 11381507 is about 224.9399477596.

Adding to 11381507 its reverse (70518311), we get a palindrome (81899818).

The spelling of 11381507 in words is "eleven million, three hundred eighty-one thousand, five hundred seven".