684896253 has 4 divisors (see below), whose sum is σ = 913195008. Its totient is φ = 456597500.

The previous prime is 684896239. The next prime is 684896269. The reversal of 684896253 is 352698486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 684896253 - 2⁶ = 684896189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 684896196 and 684896205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684896273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114149373 + ... + 114149378.

It is an arithmetic number, because the mean of its divisors is an integer number (228298752).

Almost surely, 2^684896253 is an apocalyptic number.

It is an amenable number.

684896253 is a deficient number, since it is larger than the sum of its proper divisors (228298755).

684896253 is a wasteful number, since it uses less digits than its factorization.

684896253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228298754.

The product of its digits is 2488320, while the sum is 51.

The square root of 684896253 is about 26170.5225969983. The cubic root of 684896253 is about 881.4714762286.

The spelling of 684896253 in words is "six hundred eighty-four million, eight hundred ninety-six thousand, two hundred fifty-three".