289387693 has 16 divisors (see below), whose sum is σ = 344473344. Its totient is φ = 237928320.

The previous prime is 289387649. The next prime is 289387699. The reversal of 289387693 is 396783982.

It is a happy number.

It is not a de Polignac number, because 289387693 - 2¹³ = 289379501 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 (289387699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10521 + ... + 26257.

It is an arithmetic number, because the mean of its divisors is an integer number (21529584).

Almost surely, 2^289387693 is an apocalyptic number.

It is an amenable number.

289387693 is a deficient number, since it is larger than the sum of its proper divisors (55085651).

289387693 is a wasteful number, since it uses less digits than its factorization.

289387693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15852.

The product of its digits is 3919104, while the sum is 55.

The square root of 289387693 is about 17011.3989136696. The cubic root of 289387693 is about 661.4444131119. Note that the first 4 decimals are identical.

The spelling of 289387693 in words is "two hundred eighty-nine million, three hundred eighty-seven thousand, six hundred ninety-three".