11623989 has 24 divisors (see below), whose sum is σ = 17023392. Its totient is φ = 7051200.

The previous prime is 11623987. The next prime is 11623999. The reversal of 11623989 is 98932611.

It is not a de Polignac number, because 11623989 - 2¹ = 11623987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11623987) 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 in 23 ways as a sum of consecutive naturals, for example, 51094 + ... + 51320.

It is an arithmetic number, because the mean of its divisors is an integer number (709308).

Almost surely, 2^11623989 is an apocalyptic number.

It is an amenable number.

11623989 is a deficient number, since it is larger than the sum of its proper divisors (5399403).

11623989 is a wasteful number, since it uses less digits than its factorization.

11623989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357 (or 344 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 11623989 is about 3409.3971607896. The cubic root of 11623989 is about 226.5261776000.

It can be divided in two parts, 1162 and 3989, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 11623989 in words is "eleven million, six hundred twenty-three thousand, nine hundred eighty-nine".