11503989 has 12 divisors (see below), whose sum is σ = 18990816. Its totient is φ = 6573672.

The previous prime is 11503939. The next prime is 11503993. The reversal of 11503989 is 98930511.

It is a happy number.

It is not a de Polignac number, because 11503989 - 2⁸ = 11503733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11503939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91239 + ... + 91364.

It is an arithmetic number, because the mean of its divisors is an integer number (1582568).

Almost surely, 2^11503989 is an apocalyptic number.

It is an amenable number.

11503989 is a deficient number, since it is larger than the sum of its proper divisors (7486827).

11503989 is a wasteful number, since it uses less digits than its factorization.

11503989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182616 (or 182613 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 11503989 is about 3391.7530865321. The cubic root of 11503989 is about 225.7439669767.

The spelling of 11503989 in words is "eleven million, five hundred three thousand, nine hundred eighty-nine".