1143654649 has 2 divisors, whose sum is σ = 1143654650. Its totient is φ = 1143654648.

The previous prime is 1143654641. The next prime is 1143654661. The reversal of 1143654649 is 9464563411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 928299024 + 215355625 = 30468^2 + 14675^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143654649 - 2³ = 1143654641 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143654641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571827324 + 571827325.

It is an arithmetic number, because the mean of its divisors is an integer number (571827325).

Almost surely, 2^1143654649 is an apocalyptic number.

It is an amenable number.

1143654649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143654649 is an equidigital number, since it uses as much as digits as its factorization.

1143654649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 43.

The square root of 1143654649 is about 33817.9634070415. The cubic root of 1143654649 is about 1045.7590538350.

The spelling of 1143654649 in words is "one billion, one hundred forty-three million, six hundred fifty-four thousand, six hundred forty-nine".