70730705 has 4 divisors (see below), whose sum is σ = 84876852. Its totient is φ = 56584560.

The previous prime is 70730701. The next prime is 70730719. The reversal of 70730705 is 50703707.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18905104 + 51825601 = 4348^2 + 7199^2 .

It is not a de Polignac number, because 70730705 - 2² = 70730701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70730701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7073066 + ... + 7073075.

It is an arithmetic number, because the mean of its divisors is an integer number (21219213).

Almost surely, 2^70730705 is an apocalyptic number.

It is an amenable number.

70730705 is a deficient number, since it is larger than the sum of its proper divisors (14146147).

70730705 is a wasteful number, since it uses less digits than its factorization.

70730705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14146146.

The product of its (nonzero) digits is 5145, while the sum is 29.

The square root of 70730705 is about 8410.1548737226. The cubic root of 70730705 is about 413.5575898192.

The spelling of 70730705 in words is "seventy million, seven hundred thirty thousand, seven hundred five".