840445103 has 2 divisors, whose sum is σ = 840445104. Its totient is φ = 840445102.

The previous prime is 840445087. The next prime is 840445127. The reversal of 840445103 is 301544048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 840445103 - 2⁴ = 840445087 is a prime.

It is equal to p_43117067 and since 840445103 and 43117067 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420222551 + 420222552.

It is an arithmetic number, because the mean of its divisors is an integer number (420222552).

Almost surely, 2^840445103 is an apocalyptic number.

840445103 is a deficient number, since it is larger than the sum of its proper divisors (1).

840445103 is an equidigital number, since it uses as much as digits as its factorization.

840445103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 840445103 is about 28990.4312317013. The cubic root of 840445103 is about 943.7054221711.

The spelling of 840445103 in words is "eight hundred forty million, four hundred forty-five thousand, one hundred three".