70520705 has 16 divisors (see below), whose sum is σ = 87275664. Its totient is φ = 54662400.

The previous prime is 70520699. The next prime is 70520707. The reversal of 70520705 is 50702507.

It can be written as a sum of positive squares in 8 ways, for example, as 246016 + 70274689 = 496^2 + 8383^2 .

It is not a de Polignac number, because 70520705 - 2⁴ = 70520689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70520707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53555 + ... + 54855.

It is an arithmetic number, because the mean of its divisors is an integer number (5454729).

Almost surely, 2^70520705 is an apocalyptic number.

It is an amenable number.

70520705 is a deficient number, since it is larger than the sum of its proper divisors (16754959).

70520705 is a wasteful number, since it uses less digits than its factorization.

70520705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636.

The product of its (nonzero) digits is 2450, while the sum is 26.

The square root of 70520705 is about 8397.6606861673. The cubic root of 70520705 is about 413.1478988851.

The spelling of 70520705 in words is "seventy million, five hundred twenty thousand, seven hundred five".