289378853 has 4 divisors (see below), whose sum is σ = 290423820. Its totient is φ = 288333888.

The previous prime is 289378841. The next prime is 289378877. The reversal of 289378853 is 358873982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126382564 + 162996289 = 11242^2 + 12767^2 .

It is a cyclic number.

It is not a de Polignac number, because 289378853 - 2⁸ = 289378597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 289378795 and 289378804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289371853) 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, 522068 + ... + 522621.

It is an arithmetic number, because the mean of its divisors is an integer number (72605955).

Almost surely, 2^289378853 is an apocalyptic number.

It is an amenable number.

289378853 is a deficient number, since it is larger than the sum of its proper divisors (1044967).

289378853 is a wasteful number, since it uses less digits than its factorization.

289378853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044966.

The product of its digits is 2903040, while the sum is 53.

The square root of 289378853 is about 17011.1390859049. The cubic root of 289378853 is about 661.4376779393.

The spelling of 289378853 in words is "two hundred eighty-nine million, three hundred seventy-eight thousand, eight hundred fifty-three".