241999621 has 2 divisors, whose sum is σ = 241999622. Its totient is φ = 241999620.

The previous prime is 241999619. The next prime is 241999669. The reversal of 241999621 is 126999142.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220968225 + 21031396 = 14865^2 + 4586^2 .

It is a cyclic number.

It is not a de Polignac number, because 241999621 - 2¹ = 241999619 is a prime.

Together with 241999619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (241999601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120999810 + 120999811.

It is an arithmetic number, because the mean of its divisors is an integer number (120999811).

Almost surely, 2^241999621 is an apocalyptic number.

It is an amenable number.

241999621 is a deficient number, since it is larger than the sum of its proper divisors (1).

241999621 is an equidigital number, since it uses as much as digits as its factorization.

241999621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 241999621 is about 15556.3370045779. The cubic root of 241999621 is about 623.1676431191.

The spelling of 241999621 in words is "two hundred forty-one million, nine hundred ninety-nine thousand, six hundred twenty-one".