200078261 has 2 divisors, whose sum is σ = 200078262. Its totient is φ = 200078260.

The previous prime is 200078257. The next prime is 200078267. The reversal of 200078261 is 162870002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189062500 + 11015761 = 13750^2 + 3319^2 .

It is a cyclic number.

It is not a de Polignac number, because 200078261 - 2² = 200078257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200078261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200078267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100039130 + 100039131.

It is an arithmetic number, because the mean of its divisors is an integer number (100039131).

Almost surely, 2^200078261 is an apocalyptic number.

It is an amenable number.

200078261 is a deficient number, since it is larger than the sum of its proper divisors (1).

200078261 is an equidigital number, since it uses as much as digits as its factorization.

200078261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 200078261 is about 14144.9022972942. The cubic root of 200078261 is about 584.8798165460.

The spelling of 200078261 in words is "two hundred million, seventy-eight thousand, two hundred sixty-one".