247975313 has 2 divisors, whose sum is σ = 247975314. Its totient is φ = 247975312.

The previous prime is 247975297. The next prime is 247975333. The reversal of 247975313 is 313579742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241740304 + 6235009 = 15548^2 + 2497^2 .

It is a cyclic number.

It is not a de Polignac number, because 247975313 - 2⁴ = 247975297 is a prime.

It is a super-2 number, since 2×247975313² = 122983511714895938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247975333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123987656 + 123987657.

It is an arithmetic number, because the mean of its divisors is an integer number (123987657).

Almost surely, 2^247975313 is an apocalyptic number.

It is an amenable number.

247975313 is a deficient number, since it is larger than the sum of its proper divisors (1).

247975313 is an equidigital number, since it uses as much as digits as its factorization.

247975313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 41.

The square root of 247975313 is about 15747.2319154828. The cubic root of 247975313 is about 628.2552826725.

The spelling of 247975313 in words is "two hundred forty-seven million, nine hundred seventy-five thousand, three hundred thirteen".