143645736989 has 2 divisors, whose sum is σ = 143645736990. Its totient is φ = 143645736988.

The previous prime is 143645736953. The next prime is 143645737003. The reversal of 143645736989 is 989637546341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143400814489 + 244922500 = 378683^2 + 15650^2 .

It is a cyclic number.

It is not a de Polignac number, because 143645736989 - 2³² = 139350769693 is a prime.

It is a super-2 number, since 2×143645736989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143645736889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71822868494 + 71822868495.

It is an arithmetic number, because the mean of its divisors is an integer number (71822868495).

Almost surely, 2^143645736989 is an apocalyptic number.

It is an amenable number.

143645736989 is a deficient number, since it is larger than the sum of its proper divisors (1).

143645736989 is an equidigital number, since it uses as much as digits as its factorization.

143645736989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117573120, while the sum is 65.

The spelling of 143645736989 in words is "one hundred forty-three billion, six hundred forty-five million, seven hundred thirty-six thousand, nine hundred eighty-nine".