247075057 has 2 divisors, whose sum is σ = 247075058. Its totient is φ = 247075056.

The previous prime is 247075021. The next prime is 247075079. The reversal of 247075057 is 750570742.

247075057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131813361 + 115261696 = 11481^2 + 10736^2 .

It is a cyclic number.

It is not a de Polignac number, because 247075057 - 2¹¹ = 247073009 is a prime.

It is a super-2 number, since 2×247075057² = 122092167583106498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247075007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123537528 + 123537529.

It is an arithmetic number, because the mean of its divisors is an integer number (123537529).

Almost surely, 2^247075057 is an apocalyptic number.

It is an amenable number.

247075057 is a deficient number, since it is larger than the sum of its proper divisors (1).

247075057 is an equidigital number, since it uses as much as digits as its factorization.

247075057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68600, while the sum is 37.

The square root of 247075057 is about 15718.6213453979. The cubic root of 247075057 is about 627.4940826836.

The spelling of 247075057 in words is "two hundred forty-seven million, seventy-five thousand, fifty-seven".