705499987 has 2 divisors, whose sum is σ = 705499988. Its totient is φ = 705499986.

The previous prime is 705499981. The next prime is 705500009. The reversal of 705499987 is 789994507.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (789994507) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 705499987 - 2¹¹ = 705497939 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (705499981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352749993 + 352749994.

It is an arithmetic number, because the mean of its divisors is an integer number (352749994).

Almost surely, 2^705499987 is an apocalyptic number.

705499987 is a deficient number, since it is larger than the sum of its proper divisors (1).

705499987 is an equidigital number, since it uses as much as digits as its factorization.

705499987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5715360, while the sum is 58.

The square root of 705499987 is about 26561.2497258695. The cubic root of 705499987 is about 890.2233950854.

The spelling of 705499987 in words is "seven hundred five million, four hundred ninety-nine thousand, nine hundred eighty-seven".