689244253 has 2 divisors, whose sum is σ = 689244254. Its totient is φ = 689244252.

The previous prime is 689244239. The next prime is 689244263. The reversal of 689244253 is 352442986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 686544804 + 2699449 = 26202^2 + 1643^2 .

It is a cyclic number.

It is not a de Polignac number, because 689244253 - 2⁵ = 689244221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689244203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344622126 + 344622127.

It is an arithmetic number, because the mean of its divisors is an integer number (344622127).

Almost surely, 2^689244253 is an apocalyptic number.

It is an amenable number.

689244253 is a deficient number, since it is larger than the sum of its proper divisors (1).

689244253 is an equidigital number, since it uses as much as digits as its factorization.

689244253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 43.

The square root of 689244253 is about 26253.4617336457. The cubic root of 689244253 is about 883.3328559944.

The spelling of 689244253 in words is "six hundred eighty-nine million, two hundred forty-four thousand, two hundred fifty-three".