705864687 has 32 divisors (see below), whose sum is σ = 1127761920. Its totient is φ = 387652320.

The previous prime is 705864683. The next prime is 705864697. The reversal of 705864687 is 786468507.

It is not a de Polignac number, because 705864687 - 2² = 705864683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705864683) 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, 10053 + ... + 38894.

It is an arithmetic number, because the mean of its divisors is an integer number (35242560).

Almost surely, 2^705864687 is an apocalyptic number.

705864687 is a deficient number, since it is larger than the sum of its proper divisors (421897233).

705864687 is a wasteful number, since it uses less digits than its factorization.

705864687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49003.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The square root of 705864687 is about 26568.1141031877. The cubic root of 705864687 is about 890.3767655321.

The spelling of 705864687 in words is "seven hundred five million, eight hundred sixty-four thousand, six hundred eighty-seven".