684532249 has 2 divisors, whose sum is σ = 684532250. Its totient is φ = 684532248.

The previous prime is 684532237. The next prime is 684532253. The reversal of 684532249 is 942235486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 551545225 + 132987024 = 23485^2 + 11532^2 .

It is a cyclic number.

It is not a de Polignac number, because 684532249 - 2⁹ = 684531737 is a prime.

It is not a weakly prime, because it can be changed into another prime (684232249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342266124 + 342266125.

It is an arithmetic number, because the mean of its divisors is an integer number (342266125).

Almost surely, 2^684532249 is an apocalyptic number.

It is an amenable number.

684532249 is a deficient number, since it is larger than the sum of its proper divisors (1).

684532249 is an equidigital number, since it uses as much as digits as its factorization.

684532249 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 684532249 is about 26163.5672070916. The cubic root of 684532249 is about 881.3152890682.

The spelling of 684532249 in words is "six hundred eighty-four million, five hundred thirty-two thousand, two hundred forty-nine".