244121539 has 2 divisors, whose sum is σ = 244121540. Its totient is φ = 244121538.

The previous prime is 244121489. The next prime is 244121569. The reversal of 244121539 is 935121442.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-244121539 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 244121539.

It is not a weakly prime, because it can be changed into another prime (244121569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122060769 + 122060770.

It is an arithmetic number, because the mean of its divisors is an integer number (122060770).

Almost surely, 2^244121539 is an apocalyptic number.

244121539 is a deficient number, since it is larger than the sum of its proper divisors (1).

244121539 is an equidigital number, since it uses as much as digits as its factorization.

244121539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 244121539 is about 15624.3892360630. The cubic root of 244121539 is about 624.9837128556.

The spelling of 244121539 in words is "two hundred forty-four million, one hundred twenty-one thousand, five hundred thirty-nine".