285189953 has 2 divisors, whose sum is σ = 285189954. Its totient is φ = 285189952.

The previous prime is 285189923. The next prime is 285189967. The reversal of 285189953 is 359981582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229583104 + 55606849 = 15152^2 + 7457^2 .

It is a cyclic number.

It is not a de Polignac number, because 285189953 - 2¹⁶ = 285124417 is a prime.

It is not a weakly prime, because it can be changed into another prime (285189913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142594976 + 142594977.

It is an arithmetic number, because the mean of its divisors is an integer number (142594977).

Almost surely, 2^285189953 is an apocalyptic number.

It is an amenable number.

285189953 is a deficient number, since it is larger than the sum of its proper divisors (1).

285189953 is an equidigital number, since it uses as much as digits as its factorization.

285189953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 50.

The square root of 285189953 is about 16887.5680013435. The cubic root of 285189953 is about 658.2306088647.

The spelling of 285189953 in words is "two hundred eighty-five million, one hundred eighty-nine thousand, nine hundred fifty-three".