998950261 has 2 divisors, whose sum is σ = 998950262. Its totient is φ = 998950260.

The previous prime is 998950187. The next prime is 998950273. The reversal of 998950261 is 162059899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 998939236 + 11025 = 31606^2 + 105^2 .

It is a cyclic number.

It is not a de Polignac number, because 998950261 - 2¹³ = 998942069 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998950661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499475130 + 499475131.

It is an arithmetic number, because the mean of its divisors is an integer number (499475131).

Almost surely, 2^998950261 is an apocalyptic number.

It is an amenable number.

998950261 is a deficient number, since it is larger than the sum of its proper divisors (1).

998950261 is an equidigital number, since it uses as much as digits as its factorization.

998950261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 998950261 is about 31606.1744126049. The cubic root of 998950261 is about 999.6499644894.

The spelling of 998950261 in words is "nine hundred ninety-eight million, nine hundred fifty thousand, two hundred sixty-one".