705500001 has 24 divisors (see below), whose sum is σ = 1077354720. Its totient is φ = 443641536.

The previous prime is 705499987. The next prime is 705500009. The reversal of 705500001 is 100005507.

It is a happy number.

It is not a de Polignac number, because 705500001 - 2⁶ = 705499937 is a prime.

It is a super-2 number, since 2×705500001² = 995460502822000002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (705500009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30990 + ... + 48696.

It is an arithmetic number, because the mean of its divisors is an integer number (44889780).

Almost surely, 2^705500001 is an apocalyptic number.

705500001 is the 13281-st decagonal number.

It is an amenable number.

705500001 is a deficient number, since it is larger than the sum of its proper divisors (371854719).

705500001 is a wasteful number, since it uses less digits than its factorization.

705500001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17965 (or 17962 counting only the distinct ones).

The product of its (nonzero) digits is 175, while the sum is 18.

The square root of 705500001 is about 26561.2499894113. The cubic root of 705500001 is about 890.2234009740.

Adding to 705500001 its reverse (100005507), we get a palindrome (805505508).

The spelling of 705500001 in words is "seven hundred five million, five hundred thousand, one".