2102170723 has 2 divisors, whose sum is σ = 2102170724. Its totient is φ = 2102170722.

The previous prime is 2102170699. The next prime is 2102170727. The reversal of 2102170723 is 3270712012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2102170723 - 2⁵ = 2102170691 is a prime.

It is not a weakly prime, because it can be changed into another prime (2102170727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051085361 + 1051085362.

It is an arithmetic number, because the mean of its divisors is an integer number (1051085362).

Almost surely, 2^2102170723 is an apocalyptic number.

2102170723 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102170723 is an equidigital number, since it uses as much as digits as its factorization.

2102170723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 2102170723 is about 45849.4353618450. The cubic root of 2102170723 is about 1281.0202483838.

Adding to 2102170723 its reverse (3270712012), we get a palindrome (5372882735).

The spelling of 2102170723 in words is "two billion, one hundred two million, one hundred seventy thousand, seven hundred twenty-three".