247201897 has 2 divisors, whose sum is σ = 247201898. Its totient is φ = 247201896.

The previous prime is 247201873. The next prime is 247201931. The reversal of 247201897 is 798102742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219365721 + 27836176 = 14811^2 + 5276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247201897 is a prime.

It is a super-2 number, since 2×247201897² = 122217555760797218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247201807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123600948 + 123600949.

It is an arithmetic number, because the mean of its divisors is an integer number (123600949).

Almost surely, 2^247201897 is an apocalyptic number.

It is an amenable number.

247201897 is a deficient number, since it is larger than the sum of its proper divisors (1).

247201897 is an equidigital number, since it uses as much as digits as its factorization.

247201897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 247201897 is about 15722.6555327018. The cubic root of 247201897 is about 627.6014424126.

The spelling of 247201897 in words is "two hundred forty-seven million, two hundred one thousand, eight hundred ninety-seven".