1344220981 has 2 divisors, whose sum is σ = 1344220982. Its totient is φ = 1344220980.

The previous prime is 1344220973. The next prime is 1344221107. The reversal of 1344220981 is 1890224431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1315222756 + 28998225 = 36266^2 + 5385^2 .

It is an emirp because it is prime and its reverse (1890224431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1344220981 - 2³ = 1344220973 is a prime.

It is a super-2 number, since 2×1344220981² = 3613860091521204722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1344220931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672110490 + 672110491.

It is an arithmetic number, because the mean of its divisors is an integer number (672110491).

Almost surely, 2^1344220981 is an apocalyptic number.

It is an amenable number.

1344220981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344220981 is an equidigital number, since it uses as much as digits as its factorization.

1344220981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1344220981 is about 36663.6193112464. The cubic root of 1344220981 is about 1103.6301503553.

The spelling of 1344220981 in words is "one billion, three hundred forty-four million, two hundred twenty thousand, nine hundred eighty-one".