705257771 has 4 divisors (see below), whose sum is σ = 705414312. Its totient is φ = 705101232.

The previous prime is 705257743. The next prime is 705257837. The reversal of 705257771 is 177752507.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177752507 = 41 ⋅4335427.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-705257771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705253771) 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, 71306 + ... + 80591.

It is an arithmetic number, because the mean of its divisors is an integer number (176353578).

Almost surely, 2^705257771 is an apocalyptic number.

705257771 is a deficient number, since it is larger than the sum of its proper divisors (156541).

705257771 is a wasteful number, since it uses less digits than its factorization.

705257771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156540.

The product of its (nonzero) digits is 120050, while the sum is 41.

The square root of 705257771 is about 26556.6897598326. The cubic root of 705257771 is about 890.1215046837.

The spelling of 705257771 in words is "seven hundred five million, two hundred fifty-seven thousand, seven hundred seventy-one".