289120957 has 4 divisors (see below), whose sum is σ = 290188096. Its totient is φ = 288053820.

The previous prime is 289120939. The next prime is 289120963. The reversal of 289120957 is 759021982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 289120957 - 2¹⁹ = 288596669 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 (289120927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533163 + ... + 533704.

It is an arithmetic number, because the mean of its divisors is an integer number (72547024).

Almost surely, 2^289120957 is an apocalyptic number.

It is an amenable number.

289120957 is a deficient number, since it is larger than the sum of its proper divisors (1067139).

289120957 is a wasteful number, since it uses less digits than its factorization.

289120957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067138.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 289120957 is about 17003.5571866595. The cubic root of 289120957 is about 661.2411272592.

The spelling of 289120957 in words is "two hundred eighty-nine million, one hundred twenty thousand, nine hundred fifty-seven".