70723447 has 4 divisors (see below), whose sum is σ = 70740376. Its totient is φ = 70706520.

The previous prime is 70723441. The next prime is 70723487. The reversal of 70723447 is 74432707.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74432707 = 197 ⋅377831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70723447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70723441) 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, 2797 + ... + 12217.

It is an arithmetic number, because the mean of its divisors is an integer number (17685094).

Almost surely, 2^70723447 is an apocalyptic number.

70723447 is a deficient number, since it is larger than the sum of its proper divisors (16929).

70723447 is an equidigital number, since it uses as much as digits as its factorization.

70723447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16928.

The product of its (nonzero) digits is 32928, while the sum is 34.

The square root of 70723447 is about 8409.7233604917. The cubic root of 70723447 is about 413.5434436589.

It can be divided in two parts, 707234 and 47, that added together give a 4-th power (707281 = 29⁴).

The spelling of 70723447 in words is "seventy million, seven hundred twenty-three thousand, four hundred forty-seven".