2137665897 has 24 divisors (see below), whose sum is σ = 3204321120. Its totient is φ = 1424122560.

The previous prime is 2137665857. The next prime is 2137665917. The reversal of 2137665897 is 7985667312.

2137665897 is a `hidden beast` number, since 21 + 37 + 6 + 6 + 589 + 7 = 666.

It is not a de Polignac number, because 2137665897 - 2⁸ = 2137665641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2137665857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 566497 + ... + 570257.

It is an arithmetic number, because the mean of its divisors is an integer number (133513380).

Almost surely, 2^2137665897 is an apocalyptic number.

2137665897 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2137665897 is a deficient number, since it is larger than the sum of its proper divisors (1066655223).

2137665897 is an equidigital number, since it uses as much as digits as its factorization.

2137665897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6115 (or 6103 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 2137665897 is about 46234.8991239302. The cubic root of 2137665897 is about 1288.1900577351.

The spelling of 2137665897 in words is "two billion, one hundred thirty-seven million, six hundred sixty-five thousand, eight hundred ninety-seven".