684917061 has 4 divisors (see below), whose sum is σ = 913222752. Its totient is φ = 456611372.

The previous prime is 684917011. The next prime is 684917083. The reversal of 684917061 is 160719486.

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 684917061 - 2⁹ = 684916549 is a prime.

It is a super-2 number, since 2×684917061² = 938222760897755442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684917011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114152841 + ... + 114152846.

It is an arithmetic number, because the mean of its divisors is an integer number (228305688).

Almost surely, 2^684917061 is an apocalyptic number.

It is an amenable number.

684917061 is a deficient number, since it is larger than the sum of its proper divisors (228305691).

684917061 is a wasteful number, since it uses less digits than its factorization.

684917061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228305690.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 684917061 is about 26170.9201404918. The cubic root of 684917061 is about 881.4804028714.

The spelling of 684917061 in words is "six hundred eighty-four million, nine hundred seventeen thousand, sixty-one".