1205523167 has 2 divisors, whose sum is σ = 1205523168. Its totient is φ = 1205523166.

The previous prime is 1205523157. The next prime is 1205523203. The reversal of 1205523167 is 7613255021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1205523167 - 2⁸ = 1205522911 is a prime.

It is a super-2 number, since 2×1205523167² = 2906572212347419778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205523157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602761583 + 602761584.

It is an arithmetic number, because the mean of its divisors is an integer number (602761584).

Almost surely, 2^1205523167 is an apocalyptic number.

1205523167 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205523167 is an equidigital number, since it uses as much as digits as its factorization.

1205523167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 1205523167 is about 34720.6446800747. The cubic root of 1205523167 is about 1064.2864189133.

Adding to 1205523167 its reverse (7613255021), we get a palindrome (8818778188).

The spelling of 1205523167 in words is "one billion, two hundred five million, five hundred twenty-three thousand, one hundred sixty-seven".