840805627 has 2 divisors, whose sum is σ = 840805628. Its totient is φ = 840805626.

The previous prime is 840805597. The next prime is 840805631. The reversal of 840805627 is 726508048.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840805627 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 840805627.

It is not a weakly prime, because it can be changed into another prime (840805697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420402813 + 420402814.

It is an arithmetic number, because the mean of its divisors is an integer number (420402814).

Almost surely, 2^840805627 is an apocalyptic number.

840805627 is a deficient number, since it is larger than the sum of its proper divisors (1).

840805627 is an equidigital number, since it uses as much as digits as its factorization.

840805627 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 840805627 is about 28996.6485477201. The cubic root of 840805627 is about 943.8403426694.

The spelling of 840805627 in words is "eight hundred forty million, eight hundred five thousand, six hundred twenty-seven".