705610521 has 96 divisors (see below), whose sum is σ = 1349956608. Its totient is φ = 357618240.

The previous prime is 705610501. The next prime is 705610531. The reversal of 705610521 is 125016507.

It is not a de Polignac number, because 705610521 - 2⁷ = 705610393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is not an unprimeable number, because it can be changed into a prime (705610501) 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 in 95 ways as a sum of consecutive naturals, for example, 804135 + ... + 805011.

It is an arithmetic number, because the mean of its divisors is an integer number (14062048).

Almost surely, 2^705610521 is an apocalyptic number.

It is an amenable number.

705610521 is a deficient number, since it is larger than the sum of its proper divisors (644346087).

705610521 is a wasteful number, since it uses less digits than its factorization.

705610521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953 (or 941 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 705610521 is about 26563.3303823146. The cubic root of 705610521 is about 890.2698844859.

The spelling of 705610521 in words is "seven hundred five million, six hundred ten thousand, five hundred twenty-one".