11138997 has 16 divisors (see below), whose sum is σ = 15853760. Its totient is φ = 6936192.

The previous prime is 11138989. The next prime is 11138999. The reversal of 11138997 is 79983111.

It is not a de Polignac number, because 11138997 - 2³ = 11138989 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 (11138999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2823 + ... + 5499.

It is an arithmetic number, because the mean of its divisors is an integer number (990860).

Almost surely, 2^11138997 is an apocalyptic number.

It is an amenable number.

11138997 is a deficient number, since it is larger than the sum of its proper divisors (4714763).

11138997 is a wasteful number, since it uses less digits than its factorization.

11138997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772.

The product of its digits is 13608, while the sum is 39.

The square root of 11138997 is about 3337.5135954779. The cubic root of 11138997 is about 223.3308380702.

The spelling of 11138997 in words is "eleven million, one hundred thirty-eight thousand, nine hundred ninety-seven".