70447 has 4 divisors (see below), whose sum is σ = 75880. Its totient is φ = 65016.

The previous prime is 70439. The next prime is 70451. The reversal of 70447 is 74407.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74407 = 37 ⋅2011.

It is a cyclic number.

It is not a de Polignac number, because 70447 - 2³ = 70439 is a prime.

It is a Duffinian number.

70447 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2697 + ... + 2722.

It is an arithmetic number, because the mean of its divisors is an integer number (18970).

2⁷⁰⁴⁴⁷ is an apocalyptic number.

70447 is a deficient number, since it is larger than the sum of its proper divisors (5433).

70447 is a wasteful number, since it uses less digits than its factorization.

70447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5432.

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 70447 is about 265.4185374084. The cubic root of 70447 is about 41.3003914312.

The spelling of 70447 in words is "seventy thousand, four hundred forty-seven", and thus it is an iban number.