438200261 has 2 divisors, whose sum is σ = 438200262. Its totient is φ = 438200260.

The previous prime is 438200233. The next prime is 438200267. The reversal of 438200261 is 162002834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281199361 + 157000900 = 16769^2 + 12530^2 .

It is a cyclic number.

It is not a de Polignac number, because 438200261 - 2⁶ = 438200197 is a prime.

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 438200261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438200267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219100130 + 219100131.

It is an arithmetic number, because the mean of its divisors is an integer number (219100131).

Almost surely, 2^438200261 is an apocalyptic number.

It is an amenable number.

438200261 is a deficient number, since it is larger than the sum of its proper divisors (1).

438200261 is an equidigital number, since it uses as much as digits as its factorization.

438200261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 438200261 is about 20933.2334100588. The cubic root of 438200261 is about 759.5520565560.

The spelling of 438200261 in words is "four hundred thirty-eight million, two hundred thousand, two hundred sixty-one".