247041993 has 16 divisors (see below), whose sum is σ = 360626112. Its totient is φ = 149184000.

The previous prime is 247041989. The next prime is 247042031. The reversal of 247041993 is 399140742.

It is not a de Polignac number, because 247041993 - 2² = 247041989 is a prime.

It is a super-2 number, since 2×247041993² = 122059492610824098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247041953) 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 15 ways as a sum of consecutive naturals, for example, 4048 + ... + 22593.

It is an arithmetic number, because the mean of its divisors is an integer number (22539132).

Almost surely, 2^247041993 is an apocalyptic number.

It is an amenable number.

247041993 is a deficient number, since it is larger than the sum of its proper divisors (113584119).

247041993 is a wasteful number, since it uses less digits than its factorization.

247041993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26936.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 247041993 is about 15717.5695640261. The cubic root of 247041993 is about 627.4660906635.

The spelling of 247041993 in words is "two hundred forty-seven million, forty-one thousand, nine hundred ninety-three".