684600071 has 6 divisors (see below), whose sum is σ = 709021872. Its totient is φ = 660992360.

The previous prime is 684600061. The next prime is 684600079. The reversal of 684600071 is 170006486.

It is not a de Polignac number, because 684600071 - 2¹⁴ = 684583687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684600079) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 406175 + ... + 407856.

It is an arithmetic number, because the mean of its divisors is an integer number (118170312).

Almost surely, 2^684600071 is an apocalyptic number.

684600071 is a deficient number, since it is larger than the sum of its proper divisors (24421801).

684600071 is an equidigital number, since it uses as much as digits as its factorization.

684600071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814089 (or 814060 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 684600071 is about 26164.8632902983. The cubic root of 684600071 is about 881.3443943888.

The spelling of 684600071 in words is "six hundred eighty-four million, six hundred thousand, seventy-one".