840201623 has 2 divisors, whose sum is σ = 840201624. Its totient is φ = 840201622.

The previous prime is 840201529. The next prime is 840201701. The reversal of 840201623 is 326102048.

840201623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840201623 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 840201592 and 840201601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840201023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420100811 + 420100812.

It is an arithmetic number, because the mean of its divisors is an integer number (420100812).

Almost surely, 2^840201623 is an apocalyptic number.

840201623 is a deficient number, since it is larger than the sum of its proper divisors (1).

840201623 is an equidigital number, since it uses as much as digits as its factorization.

840201623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 840201623 is about 28986.2316108873. The cubic root of 840201623 is about 943.6142817394.

The spelling of 840201623 in words is "eight hundred forty million, two hundred one thousand, six hundred twenty-three".