70726945 has 4 divisors (see below), whose sum is σ = 84872340. Its totient is φ = 56581552.

The previous prime is 70726933. The next prime is 70726991. The reversal of 70726945 is 54962707.

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 12723489 + 58003456 = 3567^2 + 7616^2 .

It is a cyclic number.

It is not a de Polignac number, because 70726945 - 2¹⁷ = 70595873 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 70726898 and 70726907.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7072690 + ... + 7072699.

It is an arithmetic number, because the mean of its divisors is an integer number (21218085).

Almost surely, 2^70726945 is an apocalyptic number.

It is an amenable number.

70726945 is a deficient number, since it is larger than the sum of its proper divisors (14145395).

70726945 is a wasteful number, since it uses less digits than its factorization.

70726945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14145394.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 70726945 is about 8409.9313314676. The cubic root of 70726945 is about 413.5502615351.

The spelling of 70726945 in words is "seventy million, seven hundred twenty-six thousand, nine hundred forty-five".