289173987001 has 3 divisors (see below), whose sum is σ = 289174524751. Its totient is φ = 289173449252.

The previous prime is 289173986951. The next prime is 289173987007. The reversal of 289173987001 is 100789371982.

The square root of 289173987001 is 537749.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 42622015401 + 246551971600 = 206451^2 + 496540^2 .

It is not a de Polignac number, because 289173987001 - 2⁹ = 289173986489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289173987007) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 268875 + ... + 806623.

Almost surely, 2^289173987001 is an apocalyptic number.

289173987001 is the 537749-th square number.

289173987001 is the 268875-th centered octagonal number.

It is an amenable number.

289173987001 is a deficient number, since it is larger than the sum of its proper divisors (537750).

289173987001 is an frugal number, since it uses more digits than its factorization.

289173987001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075498 (or 537749 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 289173987001 in words is "two hundred eighty-nine billion, one hundred seventy-three million, nine hundred eighty-seven thousand, one".