684570058 has 4 divisors (see below), whose sum is σ = 1026855090. Its totient is φ = 342285028.

The previous prime is 684570053. The next prime is 684570109. The reversal of 684570058 is 850075486.

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

It can be written as a sum of positive squares in only one way, i.e., 590344209 + 94225849 = 24297^2 + 9707^2 .

It is a junction number, because it is equal to n+sod(n) for n = 684569996 and 684570023.

It is not an unprimeable number, because it can be changed into a prime (684570053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171142513 + ... + 171142516.

Almost surely, 2^684570058 is an apocalyptic number.

684570058 is a deficient number, since it is larger than the sum of its proper divisors (342285032).

684570058 is a wasteful number, since it uses less digits than its factorization.

684570058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342285031.

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 684570058 is about 26164.2897476694. The cubic root of 684570058 is about 881.3315147641.

The spelling of 684570058 in words is "six hundred eighty-four million, five hundred seventy thousand, fifty-eight".