11507989 has 2 divisors, whose sum is σ = 11507990. Its totient is φ = 11507988.

The previous prime is 11507959. The next prime is 11508017. The reversal of 11507989 is 98970511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6812100 + 4695889 = 2610^2 + 2167^2 .

It is an emirp because it is prime and its reverse (98970511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11507989 - 2⁹ = 11507477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11507959) 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 as a sum of consecutive naturals, namely, 5753994 + 5753995.

It is an arithmetic number, because the mean of its divisors is an integer number (5753995).

Almost surely, 2^11507989 is an apocalyptic number.

It is an amenable number.

11507989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11507989 is an equidigital number, since it uses as much as digits as its factorization.

11507989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 11507989 is about 3392.3427008485. The cubic root of 11507989 is about 225.7701280829.

The spelling of 11507989 in words is "eleven million, five hundred seven thousand, nine hundred eighty-nine".