247312445 has 8 divisors (see below), whose sum is σ = 309678336. Its totient is φ = 189247696.

The previous prime is 247312441. The next prime is 247312517. The reversal of 247312445 is 544213742.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 247312445 - 2² = 247312441 is a prime.

It is a super-2 number, since 2×247312445² = 122326890903756050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247312441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1075157 + ... + 1075386.

It is an arithmetic number, because the mean of its divisors is an integer number (38709792).

Almost surely, 2^247312445 is an apocalyptic number.

It is an amenable number.

247312445 is a deficient number, since it is larger than the sum of its proper divisors (62365891).

247312445 is a wasteful number, since it uses less digits than its factorization.

247312445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150571.

The product of its digits is 26880, while the sum is 32.

The square root of 247312445 is about 15726.1707036392. The cubic root of 247312445 is about 627.6949823429.

The spelling of 247312445 in words is "two hundred forty-seven million, three hundred twelve thousand, four hundred forty-five".