247903985 has 48 divisors (see below), whose sum is σ = 357146496. Its totient is φ = 164650752.

The previous prime is 247903973. The next prime is 247904021. The reversal of 247903985 is 589309742.

It is a happy number.

It is not a de Polignac number, because 247903985 - 2⁶ = 247903921 is a prime.

It is a super-2 number, since 2×247903985² = 122912771557760450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

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 47 ways as a sum of consecutive naturals, for example, 1484372 + ... + 1484538.

It is an arithmetic number, because the mean of its divisors is an integer number (7440552).

Almost surely, 2^247903985 is an apocalyptic number.

It is an amenable number.

247903985 is a deficient number, since it is larger than the sum of its proper divisors (109242511).

247903985 is a wasteful number, since it uses less digits than its factorization.

247903985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 247903985 is about 15744.9669736078. The cubic root of 247903985 is about 628.1950394577.

The spelling of 247903985 in words is "two hundred forty-seven million, nine hundred three thousand, nine hundred eighty-five".