840264787 has 2 divisors, whose sum is σ = 840264788. Its totient is φ = 840264786.

The previous prime is 840264781. The next prime is 840264793. The reversal of 840264787 is 787462048.

It is a balanced prime because it is at equal distance from previous prime (840264781) and next prime (840264793).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840264787 is a prime.

It is not a weakly prime, because it can be changed into another prime (840264781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420132393 + 420132394.

It is an arithmetic number, because the mean of its divisors is an integer number (420132394).

Almost surely, 2^840264787 is an apocalyptic number.

840264787 is a deficient number, since it is larger than the sum of its proper divisors (1).

840264787 is an equidigital number, since it uses as much as digits as its factorization.

840264787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 602112, while the sum is 46.

The square root of 840264787 is about 28987.3211421821. The cubic root of 840264787 is about 943.6379272381.

The spelling of 840264787 in words is "eight hundred forty million, two hundred sixty-four thousand, seven hundred eighty-seven".