143987369697 has 12 divisors (see below), whose sum is σ = 207986062804. Its totient is φ = 95989592160.

The previous prime is 143987369693. The next prime is 143987369699. The reversal of 143987369697 is 796963789341.

143987369697 is a `hidden beast` number, since 1 + 439 + 8 + 73 + 69 + 69 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 79165700496 + 64821669201 = 281364^2 + 254601^2 .

It is not a de Polignac number, because 143987369697 - 2² = 143987369693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143987369693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 391947 + ... + 664527.

Almost surely, 2^143987369697 is an apocalyptic number.

It is an amenable number.

143987369697 is a deficient number, since it is larger than the sum of its proper divisors (63998693107).

143987369697 is a wasteful number, since it uses less digits than its factorization.

143987369697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331280 (or 331277 counting only the distinct ones).

The product of its digits is 370355328, while the sum is 72.

The spelling of 143987369697 in words is "one hundred forty-three billion, nine hundred eighty-seven million, three hundred sixty-nine thousand, six hundred ninety-seven".