684174047 has 2 divisors, whose sum is σ = 684174048. Its totient is φ = 684174046.

The previous prime is 684174013. The next prime is 684174053. The reversal of 684174047 is 740471486.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-684174047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 684173995 and 684174013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684174847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342087023 + 342087024.

It is an arithmetic number, because the mean of its divisors is an integer number (342087024).

Almost surely, 2^684174047 is an apocalyptic number.

684174047 is a deficient number, since it is larger than the sum of its proper divisors (1).

684174047 is an equidigital number, since it uses as much as digits as its factorization.

684174047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 41.

The square root of 684174047 is about 26156.7208762872. The cubic root of 684174047 is about 881.1615373737.

The spelling of 684174047 in words is "six hundred eighty-four million, one hundred seventy-four thousand, forty-seven".