247003345 has 8 divisors (see below), whose sum is σ = 298118376. Its totient is φ = 196459776.

The previous prime is 247003343. The next prime is 247003357. The reversal of 247003345 is 543300742.

It can be written as a sum of positive squares in 4 ways, for example, as 93837969 + 153165376 = 9687^2 + 12376^2 .

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 247003345 - 2¹ = 247003343 is a prime.

It is a super-2 number, since 2×247003345² = 122021304882378050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247003343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141912 + ... + 143641.

It is an arithmetic number, because the mean of its divisors is an integer number (37264797).

Almost surely, 2^247003345 is an apocalyptic number.

It is an amenable number.

247003345 is a deficient number, since it is larger than the sum of its proper divisors (51115031).

247003345 is a wasteful number, since it uses less digits than its factorization.

247003345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285731.

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 247003345 is about 15716.3400637680. The cubic root of 247003345 is about 627.4333680565.

The spelling of 247003345 in words is "two hundred forty-seven million, three thousand, three hundred forty-five".