70072705 has 4 divisors (see below), whose sum is σ = 84087252. Its totient is φ = 56058160.

The previous prime is 70072693. The next prime is 70072727. The reversal of 70072705 is 50727007.

It is a happy number.

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 14017536 + 56055169 = 3744^2 + 7487^2 .

It is not a de Polignac number, because 70072705 - 2⁷ = 70072577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7007266 + ... + 7007275.

It is an arithmetic number, because the mean of its divisors is an integer number (21021813).

Almost surely, 2^70072705 is an apocalyptic number.

It is an amenable number.

70072705 is a deficient number, since it is larger than the sum of its proper divisors (14014547).

70072705 is a wasteful number, since it uses less digits than its factorization.

70072705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14014546.

The product of its (nonzero) digits is 3430, while the sum is 28.

The square root of 70072705 is about 8370.9440925143. The cubic root of 70072705 is about 412.2711653945.

The spelling of 70072705 in words is "seventy million, seventy-two thousand, seven hundred five".