2017840423 has 2 divisors, whose sum is σ = 2017840424. Its totient is φ = 2017840422.

The previous prime is 2017840369. The next prime is 2017840441. The reversal of 2017840423 is 3240487102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2017840423 - 2¹³ = 2017832231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2017840723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1008920211 + 1008920212.

It is an arithmetic number, because the mean of its divisors is an integer number (1008920212).

Almost surely, 2^2017840423 is an apocalyptic number.

2017840423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2017840423 is an equidigital number, since it uses as much as digits as its factorization.

2017840423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 2017840423 is about 44920.3787049931. The cubic root of 2017840423 is about 1263.6562197238.

The spelling of 2017840423 in words is "two billion, seventeen million, eight hundred forty thousand, four hundred twenty-three".