2164512697 has 4 divisors (see below), whose sum is σ = 2177792080. Its totient is φ = 2151233316.

The previous prime is 2164512683. The next prime is 2164512751. The reversal of 2164512697 is 7962154612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2164512697 - 2⁷ = 2164512569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2164512797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6639447 + ... + 6639772.

It is an arithmetic number, because the mean of its divisors is an integer number (544448020).

Almost surely, 2^2164512697 is an apocalyptic number.

It is an amenable number.

2164512697 is a deficient number, since it is larger than the sum of its proper divisors (13279383).

2164512697 is a wasteful number, since it uses less digits than its factorization.

2164512697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13279382.

The product of its digits is 181440, while the sum is 43.

The square root of 2164512697 is about 46524.3237135157. The cubic root of 2164512697 is about 1293.5604018113.

The spelling of 2164512697 in words is "two billion, one hundred sixty-four million, five hundred twelve thousand, six hundred ninety-seven".