1143777497 has 2 divisors, whose sum is σ = 1143777498. Its totient is φ = 1143777496.

The previous prime is 1143777461. The next prime is 1143777587. The reversal of 1143777497 is 7947773411.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1019588761 + 124188736 = 31931^2 + 11144^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143777497 - 2⁸ = 1143777241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143077497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571888748 + 571888749.

It is an arithmetic number, because the mean of its divisors is an integer number (571888749).

Almost surely, 2^1143777497 is an apocalyptic number.

It is an amenable number.

1143777497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143777497 is an equidigital number, since it uses as much as digits as its factorization.

1143777497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1037232, while the sum is 50.

The square root of 1143777497 is about 33819.7796710741. The cubic root of 1143777497 is about 1045.7964966093.

The spelling of 1143777497 in words is "one billion, one hundred forty-three million, seven hundred seventy-seven thousand, four hundred ninety-seven".