289652621 has 8 divisors (see below), whose sum is σ = 291328440. Its totient is φ = 287981568.

The previous prime is 289652617. The next prime is 289652641. The reversal of 289652621 is 126256982.

It can be written as a sum of positive squares in 4 ways, for example, as 31696900 + 257955721 = 5630^2 + 16061^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 289652621 - 2² = 289652617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289652611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258755 + ... + 259871.

It is an arithmetic number, because the mean of its divisors is an integer number (36416055).

Almost surely, 2^289652621 is an apocalyptic number.

It is an amenable number.

289652621 is a deficient number, since it is larger than the sum of its proper divisors (1675819).

289652621 is a wasteful number, since it uses less digits than its factorization.

289652621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383.

The product of its digits is 103680, while the sum is 41.

The square root of 289652621 is about 17019.1839111046. The cubic root of 289652621 is about 661.6461974336.

The spelling of 289652621 in words is "two hundred eighty-nine million, six hundred fifty-two thousand, six hundred twenty-one".