700649639 has 2 divisors, whose sum is σ = 700649640. Its totient is φ = 700649638.

The previous prime is 700649629. The next prime is 700649659. The reversal of 700649639 is 936946007.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 700649639 - 2¹⁶ = 700584103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 700649639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (700649629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350324819 + 350324820.

It is an arithmetic number, because the mean of its divisors is an integer number (350324820).

Almost surely, 2^700649639 is an apocalyptic number.

700649639 is a deficient number, since it is larger than the sum of its proper divisors (1).

700649639 is an equidigital number, since it uses as much as digits as its factorization.

700649639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 700649639 is about 26469.7872866406. The cubic root of 700649639 is about 888.1785916094.

The spelling of 700649639 in words is "seven hundred million, six hundred forty-nine thousand, six hundred thirty-nine".