684257369379 has 4 divisors (see below), whose sum is σ = 912343159176. Its totient is φ = 456171579584.

The previous prime is 684257369321. The next prime is 684257369401. The reversal of 684257369379 is 973963752486.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 684257369379 - 2¹² = 684257365283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684257369309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114042894894 + ... + 114042894899.

It is an arithmetic number, because the mean of its divisors is an integer number (228085789794).

Almost surely, 2^684257369379 is an apocalyptic number.

684257369379 is a deficient number, since it is larger than the sum of its proper divisors (228085789797).

684257369379 is a wasteful number, since it uses less digits than its factorization.

684257369379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228085789796.

The product of its digits is 411505920, while the sum is 69.

The spelling of 684257369379 in words is "six hundred eighty-four billion, two hundred fifty-seven million, three hundred sixty-nine thousand, three hundred seventy-nine".