70445217 has 16 divisors (see below), whose sum is σ = 99754560. Its totient is φ = 44093952.

The previous prime is 70445201. The next prime is 70445227. The reversal of 70445217 is 71254407.

It is not a de Polignac number, because 70445217 - 2⁴ = 70445201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70445227) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 973 + ... + 11909.

It is an arithmetic number, because the mean of its divisors is an integer number (6234660).

Almost surely, 2^70445217 is an apocalyptic number.

It is an amenable number.

70445217 is a deficient number, since it is larger than the sum of its proper divisors (29309343).

70445217 is a wasteful number, since it uses less digits than its factorization.

70445217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11072.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 70445217 is about 8393.1648977010. The cubic root of 70445217 is about 413.0004299331. Note that the first 3 decimals are identical.

The spelling of 70445217 in words is "seventy million, four hundred forty-five thousand, two hundred seventeen".