241020991 has 2 divisors, whose sum is σ = 241020992. Its totient is φ = 241020990.

The previous prime is 241020971. The next prime is 241021007. The reversal of 241020991 is 199020142.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 241020991 - 2¹³ = 241012799 is a prime.

It is a super-2 number, since 2×241020991² = 116182236205244162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (241020911) 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, 120510495 + 120510496.

It is an arithmetic number, because the mean of its divisors is an integer number (120510496).

Almost surely, 2^241020991 is an apocalyptic number.

241020991 is a deficient number, since it is larger than the sum of its proper divisors (1).

241020991 is an equidigital number, since it uses as much as digits as its factorization.

241020991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 241020991 is about 15524.8507561264. The cubic root of 241020991 is about 622.3264923979.

The spelling of 241020991 in words is "two hundred forty-one million, twenty thousand, nine hundred ninety-one".