705995861 has 4 divisors (see below), whose sum is σ = 706077900. Its totient is φ = 705913824.

The previous prime is 705995837. The next prime is 705995867. The reversal of 705995861 is 168599507.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168599507 = 353 ⋅477619.

It can be written as a sum of positive squares in 2 ways, for example, as 234671761 + 471324100 = 15319^2 + 21710^2 .

It is a cyclic number.

It is not a de Polignac number, because 705995861 - 2²² = 701801557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705995867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26366 + ... + 45903.

It is an arithmetic number, because the mean of its divisors is an integer number (176519475).

Almost surely, 2^705995861 is an apocalyptic number.

It is an amenable number.

705995861 is a deficient number, since it is larger than the sum of its proper divisors (82039).

705995861 is an equidigital number, since it uses as much as digits as its factorization.

705995861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82038.

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 705995861 is about 26570.5826243987. The cubic root of 705995861 is about 890.4319163516.

The spelling of 705995861 in words is "seven hundred five million, nine hundred ninety-five thousand, eight hundred sixty-one".