705438787 has 2 divisors, whose sum is σ = 705438788. Its totient is φ = 705438786.

The previous prime is 705438719. The next prime is 705438809. The reversal of 705438787 is 787834507.

It is a strong prime.

It is an emirp because it is prime and its reverse (787834507) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-705438787 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 705438787.

It is not a weakly prime, because it can be changed into another prime (705438887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352719393 + 352719394.

It is an arithmetic number, because the mean of its divisors is an integer number (352719394).

Almost surely, 2^705438787 is an apocalyptic number.

705438787 is a deficient number, since it is larger than the sum of its proper divisors (1).

705438787 is an equidigital number, since it uses as much as digits as its factorization.

705438787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The square root of 705438787 is about 26560.0976466579. The cubic root of 705438787 is about 890.1976529412.

The spelling of 705438787 in words is "seven hundred five million, four hundred thirty-eight thousand, seven hundred eighty-seven".