11989495 has 16 divisors (see below), whose sum is σ = 16499520. Its totient is φ = 8193024.

The previous prime is 11989493. The next prime is 11989511. The reversal of 11989495 is 59498911.

It is not a de Polignac number, because 11989495 - 2¹ = 11989493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11989493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17479 + ... + 18151.

It is an arithmetic number, because the mean of its divisors is an integer number (1031220).

Almost surely, 2^11989495 is an apocalyptic number.

11989495 is a deficient number, since it is larger than the sum of its proper divisors (4510025).

11989495 is an equidigital number, since it uses as much as digits as its factorization.

11989495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194.

The product of its digits is 116640, while the sum is 46.

The square root of 11989495 is about 3462.5850170068. The cubic root of 11989495 is about 228.8760222115.

The spelling of 11989495 in words is "eleven million, nine hundred eighty-nine thousand, four hundred ninety-five".