1144663381 has 2 divisors, whose sum is σ = 1144663382. Its totient is φ = 1144663380.

The previous prime is 1144663337. The next prime is 1144663439. The reversal of 1144663381 is 1833664411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1144468900 + 194481 = 33830^2 + 441^2 .

It is an emirp because it is prime and its reverse (1833664411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1144663381 - 2⁷ = 1144663253 is a prime.

It is a super-2 number, since 2×1144663381² = 2620508511604702322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1144663381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1144663081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572331690 + 572331691.

It is an arithmetic number, because the mean of its divisors is an integer number (572331691).

Almost surely, 2^1144663381 is an apocalyptic number.

It is an amenable number.

1144663381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144663381 is an equidigital number, since it uses as much as digits as its factorization.

1144663381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 1144663381 is about 33832.8742645374. The cubic root of 1144663381 is about 1046.0664253619.

The spelling of 1144663381 in words is "one billion, one hundred forty-four million, six hundred sixty-three thousand, three hundred eighty-one".