2170649893 has 4 divisors (see below), whose sum is σ = 2173237920. Its totient is φ = 2168061868.

The previous prime is 2170649891. The next prime is 2170649911. The reversal of 2170649893 is 3989460712.

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 2170649893 - 2¹ = 2170649891 is a prime.

It is a super-2 number, since 2×2170649893² = 9423441915961822898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2170649891) 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, 1292755 + ... + 1294432.

It is an arithmetic number, because the mean of its divisors is an integer number (543309480).

Almost surely, 2^2170649893 is an apocalyptic number.

It is an amenable number.

2170649893 is a deficient number, since it is larger than the sum of its proper divisors (2588027).

2170649893 is an equidigital number, since it uses as much as digits as its factorization.

2170649893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2588026.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 2170649893 is about 46590.2338800741. The cubic root of 2170649893 is about 1294.7818225884.

The spelling of 2170649893 in words is "two billion, one hundred seventy million, six hundred forty-nine thousand, eight hundred ninety-three".