1244346661 has 2 divisors, whose sum is σ = 1244346662. Its totient is φ = 1244346660.

The previous prime is 1244346659. The next prime is 1244346721. The reversal of 1244346661 is 1666434421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1195430625 + 48916036 = 34575^2 + 6994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244346661 - 2¹ = 1244346659 is a prime.

It is a super-2 number, since 2×1244346661² = 3096797225483697842, which contains 22 as substring.

Together with 1244346659, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1244346661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244346641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622173330 + 622173331.

It is an arithmetic number, because the mean of its divisors is an integer number (622173331).

Almost surely, 2^1244346661 is an apocalyptic number.

It is an amenable number.

1244346661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244346661 is an equidigital number, since it uses as much as digits as its factorization.

1244346661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 37.

The square root of 1244346661 is about 35275.2981702494. The cubic root of 1244346661 is about 1075.5909240028.

The spelling of 1244346661 in words is "one billion, two hundred forty-four million, three hundred forty-six thousand, six hundred sixty-one".