684752701 has 2 divisors, whose sum is σ = 684752702. Its totient is φ = 684752700.

The previous prime is 684752699. The next prime is 684752753. The reversal of 684752701 is 107257486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 604668100 + 80084601 = 24590^2 + 8949^2 .

It is a cyclic number.

It is not a de Polignac number, because 684752701 - 2¹ = 684752699 is a prime.

Together with 684752699, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684752771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342376350 + 342376351.

It is an arithmetic number, because the mean of its divisors is an integer number (342376351).

Almost surely, 2^684752701 is an apocalyptic number.

It is an amenable number.

684752701 is a deficient number, since it is larger than the sum of its proper divisors (1).

684752701 is an equidigital number, since it uses as much as digits as its factorization.

684752701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 684752701 is about 26167.7798255794. The cubic root of 684752701 is about 881.4098874189.

The spelling of 684752701 in words is "six hundred eighty-four million, seven hundred fifty-two thousand, seven hundred one".