11638897 has 16 divisors (see below), whose sum is σ = 13029120. Its totient is φ = 10376256.

The previous prime is 11638877. The next prime is 11638903. The reversal of 11638897 is 79883611.

It is not a de Polignac number, because 11638897 - 2⁷ = 11638769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11638807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112948 + ... + 113050.

It is an arithmetic number, because the mean of its divisors is an integer number (814320).

Almost surely, 2^11638897 is an apocalyptic number.

11638897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11638897 is a deficient number, since it is larger than the sum of its proper divisors (1390223).

11638897 is an equidigital number, since it uses as much as digits as its factorization.

11638897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 143 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 11638897 is about 3411.5827705040. The cubic root of 11638897 is about 226.6229776908.

The spelling of 11638897 in words is "eleven million, six hundred thirty-eight thousand, eight hundred ninety-seven".