840625043 has 2 divisors, whose sum is σ = 840625044. Its totient is φ = 840625042.

The previous prime is 840625031. The next prime is 840625057. The reversal of 840625043 is 340526048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 840625043 - 2⁸ = 840624787 is a prime.

It is not a weakly prime, because it can be changed into another prime (840625243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420312521 + 420312522.

It is an arithmetic number, because the mean of its divisors is an integer number (420312522).

Almost surely, 2^840625043 is an apocalyptic number.

840625043 is a deficient number, since it is larger than the sum of its proper divisors (1).

840625043 is an equidigital number, since it uses as much as digits as its factorization.

840625043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 840625043 is about 28993.5345034027. The cubic root of 840625043 is about 943.7727667388.

The spelling of 840625043 in words is "eight hundred forty million, six hundred twenty-five thousand, forty-three".