689215273 has 2 divisors, whose sum is σ = 689215274. Its totient is φ = 689215272.

The previous prime is 689215231. The next prime is 689215277. The reversal of 689215273 is 372512986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 513838224 + 175377049 = 22668^2 + 13243^2 .

It is a cyclic number.

It is not a de Polignac number, because 689215273 - 2⁹ = 689214761 is a prime.

It is not a weakly prime, because it can be changed into another prime (689215277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344607636 + 344607637.

It is an arithmetic number, because the mean of its divisors is an integer number (344607637).

Almost surely, 2^689215273 is an apocalyptic number.

It is an amenable number.

689215273 is a deficient number, since it is larger than the sum of its proper divisors (1).

689215273 is an equidigital number, since it uses as much as digits as its factorization.

689215273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 689215273 is about 26252.9098006297. The cubic root of 689215273 is about 883.3204756010.

The spelling of 689215273 in words is "six hundred eighty-nine million, two hundred fifteen thousand, two hundred seventy-three".