229697257 has 2 divisors, whose sum is σ = 229697258. Its totient is φ = 229697256.

The previous prime is 229697243. The next prime is 229697287. The reversal of 229697257 is 752796922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116402521 + 113294736 = 10789^2 + 10644^2 .

It is a cyclic number.

It is not a de Polignac number, because 229697257 - 2¹¹ = 229695209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 229697257.

It is not a weakly prime, because it can be changed into another prime (229697227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114848628 + 114848629.

It is an arithmetic number, because the mean of its divisors is an integer number (114848629).

Almost surely, 2^229697257 is an apocalyptic number.

It is an amenable number.

229697257 is a deficient number, since it is larger than the sum of its proper divisors (1).

229697257 is an equidigital number, since it uses as much as digits as its factorization.

229697257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 49.

The square root of 229697257 is about 15155.7664603279. The cubic root of 229697257 is about 612.4236257402.

The spelling of 229697257 in words is "two hundred twenty-nine million, six hundred ninety-seven thousand, two hundred fifty-seven".