247047345 has 48 divisors (see below), whose sum is σ = 441119952. Its totient is φ = 127825920.

The previous prime is 247047343. The next prime is 247047371. The reversal of 247047345 is 543740742.

It can be written as a sum of positive squares in 8 ways, for example, as 3968064 + 243079281 = 1992^2 + 15591^2 .

It is not a de Polignac number, because 247047345 - 2¹ = 247047343 is a prime.

It is a super-2 number, since 2×247047345² = 122064781343098050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247047343) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 540357 + ... + 540813.

It is an arithmetic number, because the mean of its divisors is an integer number (9189999).

Almost surely, 2^247047345 is an apocalyptic number.

It is an amenable number.

247047345 is a deficient number, since it is larger than the sum of its proper divisors (194072607).

247047345 is a wasteful number, since it uses less digits than its factorization.

247047345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 36.

The square root of 247047345 is about 15717.7398184345. The cubic root of 247047345 is about 627.4706218422.

The spelling of 247047345 in words is "two hundred forty-seven million, forty-seven thousand, three hundred forty-five".