1143506657 has 2 divisors, whose sum is σ = 1143506658. Its totient is φ = 1143506656.

The previous prime is 1143506633. The next prime is 1143506677. The reversal of 1143506657 is 7566053411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 897361936 + 246144721 = 29956^2 + 15689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143506657 - 2⁸ = 1143506401 is a prime.

It is a super-4 number, since 4×1143506657⁴ (a number of 37 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1143506657.

It is not a weakly prime, because it can be changed into another prime (1143506677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571753328 + 571753329.

It is an arithmetic number, because the mean of its divisors is an integer number (571753329).

Almost surely, 2^1143506657 is an apocalyptic number.

It is an amenable number.

1143506657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143506657 is an equidigital number, since it uses as much as digits as its factorization.

1143506657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 1143506657 is about 33815.7752683566. The cubic root of 1143506657 is about 1045.7139438740.

The spelling of 1143506657 in words is "one billion, one hundred forty-three million, five hundred six thousand, six hundred fifty-seven".