2168357923 has 2 divisors, whose sum is σ = 2168357924. Its totient is φ = 2168357922.

The previous prime is 2168357839. The next prime is 2168357999. The reversal of 2168357923 is 3297538612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2168357923 - 2¹³ = 2168349731 is a prime.

It is not a weakly prime, because it can be changed into another prime (2168307923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084178961 + 1084178962.

It is an arithmetic number, because the mean of its divisors is an integer number (1084178962).

Almost surely, 2^2168357923 is an apocalyptic number.

2168357923 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168357923 is an equidigital number, since it uses as much as digits as its factorization.

2168357923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 2168357923 is about 46565.6302759879. The cubic root of 2168357923 is about 1294.3259458785.

The spelling of 2168357923 in words is "two billion, one hundred sixty-eight million, three hundred fifty-seven thousand, nine hundred twenty-three".