289785949 has 4 divisors (see below), whose sum is σ = 291870880. Its totient is φ = 287701020.

The previous prime is 289785913. The next prime is 289785959. The reversal of 289785949 is 949587982.

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 289785949 - 2⁹ = 289785437 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 (289785959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1042257 + ... + 1042534.

It is an arithmetic number, because the mean of its divisors is an integer number (72967720).

Almost surely, 2^289785949 is an apocalyptic number.

It is an amenable number.

289785949 is a deficient number, since it is larger than the sum of its proper divisors (2084931).

289785949 is a wasteful number, since it uses less digits than its factorization.

289785949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084930.

The product of its digits is 13063680, while the sum is 61.

The square root of 289785949 is about 17023.1004520328. The cubic root of 289785949 is about 661.7477011268.

The spelling of 289785949 in words is "two hundred eighty-nine million, seven hundred eighty-five thousand, nine hundred forty-nine".