1144681357 has 2 divisors, whose sum is σ = 1144681358. Its totient is φ = 1144681356.

The previous prime is 1144681339. The next prime is 1144681393. The reversal of 1144681357 is 7531864411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 987279241 + 157402116 = 31421^2 + 12546^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1144681357 is a prime.

It is a super-2 number, since 2×1144681357² = 2620590818126722898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1144681157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572340678 + 572340679.

It is an arithmetic number, because the mean of its divisors is an integer number (572340679).

Almost surely, 2^1144681357 is an apocalyptic number.

It is an amenable number.

1144681357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144681357 is an equidigital number, since it uses as much as digits as its factorization.

1144681357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 1144681357 is about 33833.1399222715. The cubic root of 1144681357 is about 1046.0719012051.

The spelling of 1144681357 in words is "one billion, one hundred forty-four million, six hundred eighty-one thousand, three hundred fifty-seven".