2138697 has 32 divisors (see below), whose sum is σ = 3648000. Its totient is φ = 1224720.

The previous prime is 2138693. The next prime is 2138713. The reversal of 2138697 is 7968312.

It is not a de Polignac number, because 2138697 - 2² = 2138693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2138693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5454 + ... + 5832.

It is an arithmetic number, because the mean of its divisors is an integer number (114000).

2^2138697 is an apocalyptic number.

2138697 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2138697 is a deficient number, since it is larger than the sum of its proper divisors (1509303).

2138697 is a wasteful number, since it uses less digits than its factorization.

2138697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 412 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 2138697 is about 1462.4284597887. The cubic root of 2138697 is about 128.8397143905.

The spelling of 2138697 in words is "two million, one hundred thirty-eight thousand, six hundred ninety-seven".