705742143 has 32 divisors (see below), whose sum is σ = 1017515520. Its totient is φ = 433973760.

The previous prime is 705742109. The next prime is 705742153. The reversal of 705742143 is 341247507.

It is not a de Polignac number, because 705742143 - 2²⁰ = 704693567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705742153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250380 + ... + 253182.

It is an arithmetic number, because the mean of its divisors is an integer number (31797360).

Almost surely, 2^705742143 is an apocalyptic number.

705742143 is a deficient number, since it is larger than the sum of its proper divisors (311773377).

705742143 is a wasteful number, since it uses less digits than its factorization.

705742143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959.

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 705742143 is about 26565.8077799264. The cubic root of 705742143 is about 890.3252369379.

The spelling of 705742143 in words is "seven hundred five million, seven hundred forty-two thousand, one hundred forty-three".