2168606397 has 4 divisors (see below), whose sum is σ = 2891475200. Its totient is φ = 1445737596.

The previous prime is 2168606351. The next prime is 2168606423. The reversal of 2168606397 is 7936068612.

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 not a de Polignac number, because 2168606397 - 2¹⁸ = 2168344253 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 (2168606347) 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, 361434397 + ... + 361434402.

It is an arithmetic number, because the mean of its divisors is an integer number (722868800).

Almost surely, 2^2168606397 is an apocalyptic number.

It is an amenable number.

2168606397 is a deficient number, since it is larger than the sum of its proper divisors (722868803).

2168606397 is an equidigital number, since it uses as much as digits as its factorization.

2168606397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722868802.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 2168606397 is about 46568.2981973789. The cubic root of 2168606397 is about 1294.3753832981.

The spelling of 2168606397 in words is "two billion, one hundred sixty-eight million, six hundred six thousand, three hundred ninety-seven".