205029901 has 2 divisors, whose sum is σ = 205029902. Its totient is φ = 205029900.

The previous prime is 205029871. The next prime is 205029907. The reversal of 205029901 is 109920502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182277001 + 22752900 = 13501^2 + 4770^2 .

It is a cyclic number.

It is not a de Polignac number, because 205029901 - 2²³ = 196641293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205029901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205029907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102514950 + 102514951.

It is an arithmetic number, because the mean of its divisors is an integer number (102514951).

Almost surely, 2^205029901 is an apocalyptic number.

It is an amenable number.

205029901 is a deficient number, since it is larger than the sum of its proper divisors (1).

205029901 is an equidigital number, since it uses as much as digits as its factorization.

205029901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 205029901 is about 14318.8652134169. The cubic root of 205029901 is about 589.6655204595.

It can be divided in two parts, 20502 and 9901, that added together give a palindrome (30403).

The spelling of 205029901 in words is "two hundred five million, twenty-nine thousand, nine hundred one".