11237989 has 4 divisors (see below), whose sum is σ = 12843424. Its totient is φ = 9632556.

The previous prime is 11237983. The next prime is 11238001. The reversal of 11237989 is 98973211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98973211 = 47 ⋅2105813.

It is a cyclic number.

It is not a de Polignac number, because 11237989 - 2³ = 11237981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11237981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 802707 + ... + 802720.

It is an arithmetic number, because the mean of its divisors is an integer number (3210856).

Almost surely, 2^11237989 is an apocalyptic number.

It is an amenable number.

11237989 is a deficient number, since it is larger than the sum of its proper divisors (1605435).

11237989 is an equidigital number, since it uses as much as digits as its factorization.

11237989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605434.

The product of its digits is 27216, while the sum is 40.

The square root of 11237989 is about 3352.3109939264. The cubic root of 11237989 is about 223.9904664841.

The spelling of 11237989 in words is "eleven million, two hundred thirty-seven thousand, nine hundred eighty-nine".