247732897 has 2 divisors, whose sum is σ = 247732898. Its totient is φ = 247732896.

The previous prime is 247732883. The next prime is 247732907. The reversal of 247732897 is 798237742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245987856 + 1745041 = 15684^2 + 1321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247732897 is a prime.

It is a super-2 number, since 2×247732897² = 122743176512025218, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 247732897.

It is not a weakly prime, because it can be changed into another prime (247732867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123866448 + 123866449.

It is an arithmetic number, because the mean of its divisors is an integer number (123866449).

Almost surely, 2^247732897 is an apocalyptic number.

It is an amenable number.

247732897 is a deficient number, since it is larger than the sum of its proper divisors (1).

247732897 is an equidigital number, since it uses as much as digits as its factorization.

247732897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 49.

The square root of 247732897 is about 15739.5329346204. The cubic root of 247732897 is about 628.0504924106.

The spelling of 247732897 in words is "two hundred forty-seven million, seven hundred thirty-two thousand, eight hundred ninety-seven".