143794915209 has 27 divisors (see below), whose sum is σ = 228322356717. Its totient is φ = 87140849400.

The previous prime is 143794915139. The next prime is 143794915217. The reversal of 143794915209 is 902519497341.

The square root of 143794915209 is 379203.

It is a perfect power (a square), and thus also a powerful number.

143794915209 is a `hidden beast` number, since 1 + 4 + 3 + 79 + 49 + 1 + 520 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-143794915209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143794915309) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12507954 + ... + 12519444.

Almost surely, 2^143794915209 is an apocalyptic number.

143794915209 is the 379203-rd square number.

143794915209 is the 189602-nd centered octagonal number.

It is an amenable number.

143794915209 is a deficient number, since it is larger than the sum of its proper divisors (84527441508).

143794915209 is an frugal number, since it uses more digits than its factorization.

143794915209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23010 (or 11505 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 143794915209 in words is "one hundred forty-three billion, seven hundred ninety-four million, nine hundred fifteen thousand, two hundred nine".