705879961 has 8 divisors (see below), whose sum is σ = 713689704. Its totient is φ = 698081280.

The previous prime is 705879943. The next prime is 705879989. The reversal of 705879961 is 169978507.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 90839961 + 615040000 = 9531^2 + 24800^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 705879961 - 2⁵ = 705879929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 705879899 and 705879908.

It is not an unprimeable number, because it can be changed into a prime (705879991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230601 + ... + 233641.

It is an arithmetic number, because the mean of its divisors is an integer number (89211213).

Almost surely, 2^705879961 is an apocalyptic number.

It is an amenable number.

705879961 is a deficient number, since it is larger than the sum of its proper divisors (7809743).

705879961 is a wasteful number, since it uses less digits than its factorization.

705879961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5531.

The product of its (nonzero) digits is 952560, while the sum is 52.

The square root of 705879961 is about 26568.4015514671. The cubic root of 705879961 is about 890.3831876868.

The spelling of 705879961 in words is "seven hundred five million, eight hundred seventy-nine thousand, nine hundred sixty-one".