289861693 has 4 divisors (see below), whose sum is σ = 316212768. Its totient is φ = 263510620.

The previous prime is 289861669. The next prime is 289861711. The reversal of 289861693 is 396168982.

It is a happy number.

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 289861693 - 2⁵ = 289861661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 289861693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289861633) 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, 13175521 + ... + 13175542.

It is an arithmetic number, because the mean of its divisors is an integer number (79053192).

Almost surely, 2^289861693 is an apocalyptic number.

It is an amenable number.

289861693 is a deficient number, since it is larger than the sum of its proper divisors (26351075).

289861693 is a wasteful number, since it uses less digits than its factorization.

289861693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26351074.

The product of its digits is 1119744, while the sum is 52.

The square root of 289861693 is about 17025.3250482920. The cubic root of 289861693 is about 661.8053517842.

The spelling of 289861693 in words is "two hundred eighty-nine million, eight hundred sixty-one thousand, six hundred ninety-three".