247370985 has 12 divisors (see below), whose sum is σ = 428776452. Its totient is φ = 131931168.

The previous prime is 247370969. The next prime is 247370993. The reversal of 247370985 is 589073742.

It can be written as a sum of positive squares in 2 ways, for example, as 28005264 + 219365721 = 5292^2 + 14811^2 .

It is not a de Polignac number, because 247370985 - 2⁴ = 247370969 is a prime.

It is a super-2 number, since 2×247370985² = 122384808439740450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 5497133 = 247370985 / (2 + 4 + 7 + 3 + 7 + 0 + 9 + 8 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 247370985.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2748522 + ... + 2748611.

It is an arithmetic number, because the mean of its divisors is an integer number (35731371).

Almost surely, 2^247370985 is an apocalyptic number.

It is an amenable number.

247370985 is a deficient number, since it is larger than the sum of its proper divisors (181405467).

247370985 is a wasteful number, since it uses less digits than its factorization.

247370985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5497144 (or 5497141 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 247370985 is about 15728.0318221957. The cubic root of 247370985 is about 627.7445045379.

The spelling of 247370985 in words is "two hundred forty-seven million, three hundred seventy thousand, nine hundred eighty-five".