11998995 has 16 divisors (see below), whose sum is σ = 19284480. Its totient is φ = 6370784.

The previous prime is 11998979. The next prime is 11999027. The reversal of 11998995 is 59989911.

It is not a de Polignac number, because 11998995 - 2⁴ = 11998979 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1912 + ... + 5258.

It is an arithmetic number, because the mean of its divisors is an integer number (1205280).

Almost surely, 2^11998995 is an apocalyptic number.

11998995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11998995 is a deficient number, since it is larger than the sum of its proper divisors (7285485).

11998995 is a wasteful number, since it uses less digits than its factorization.

11998995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594.

The product of its digits is 262440, while the sum is 51.

The square root of 11998995 is about 3463.9565528453. The cubic root of 11998995 is about 228.9364570110.

The spelling of 11998995 in words is "eleven million, nine hundred ninety-eight thousand, nine hundred ninety-five".