247339073 has 4 divisors (see below), whose sum is σ = 247370928. Its totient is φ = 247307220.

The previous prime is 247339013. The next prime is 247339091. The reversal of 247339073 is 370933742.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247339073 is a prime.

It is a super-2 number, since 2×247339073² = 122353234064998658, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (247339013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4190 + ... + 22632.

It is an arithmetic number, because the mean of its divisors is an integer number (61842732).

Almost surely, 2^247339073 is an apocalyptic number.

It is an amenable number.

247339073 is a deficient number, since it is larger than the sum of its proper divisors (31855).

247339073 is a wasteful number, since it uses less digits than its factorization.

247339073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31854.

The product of its (nonzero) digits is 95256, while the sum is 38.

The square root of 247339073 is about 15727.0172950881. The cubic root of 247339073 is about 627.7175093966.

The spelling of 247339073 in words is "two hundred forty-seven million, three hundred thirty-nine thousand, seventy-three".