289893823 has 2 divisors, whose sum is σ = 289893824. Its totient is φ = 289893822.

The previous prime is 289893761. The next prime is 289893827. The reversal of 289893823 is 328398982.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289893823 is a prime.

It is a super-2 number, since 2×289893823² = 168076857227110658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289893827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144946911 + 144946912.

It is an arithmetic number, because the mean of its divisors is an integer number (144946912).

Almost surely, 2^289893823 is an apocalyptic number.

289893823 is a deficient number, since it is larger than the sum of its proper divisors (1).

289893823 is an equidigital number, since it uses as much as digits as its factorization.

289893823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 52.

The square root of 289893823 is about 17026.2686164644. The cubic root of 289893823 is about 661.8298036991.

It can be divided in two parts, 2898 and 93823, that added together give a square (96721 = 311²).

The spelling of 289893823 in words is "two hundred eighty-nine million, eight hundred ninety-three thousand, eight hundred twenty-three".