705948391 has 2 divisors, whose sum is σ = 705948392. Its totient is φ = 705948390.

The previous prime is 705948371. The next prime is 705948431. The reversal of 705948391 is 193849507.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (193849507) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 705948391 - 2⁷ = 705948263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (705948371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352974195 + 352974196.

It is an arithmetic number, because the mean of its divisors is an integer number (352974196).

Almost surely, 2^705948391 is an apocalyptic number.

705948391 is a deficient number, since it is larger than the sum of its proper divisors (1).

705948391 is an equidigital number, since it uses as much as digits as its factorization.

705948391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 705948391 is about 26569.6893282552. The cubic root of 705948391 is about 890.4119588453.

The spelling of 705948391 in words is "seven hundred five million, nine hundred forty-eight thousand, three hundred ninety-one".