700639 has 2 divisors, whose sum is σ = 700640. Its totient is φ = 700638.

The previous prime is 700633. The next prime is 700643. The reversal of 700639 is 936007.

It is a strong prime.

It is an emirp because it is prime and its reverse (936007) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 700639 - 2⁹ = 700127 is a prime.

700639 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (700633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350319 + 350320.

It is an arithmetic number, because the mean of its divisors is an integer number (350320).

2⁷⁰⁰⁶³⁹ is an apocalyptic number.

700639 is a deficient number, since it is larger than the sum of its proper divisors (1).

700639 is an equidigital number, since it uses as much as digits as its factorization.

700639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 700639 is about 837.0418149651. The cubic root of 700639 is about 88.8174096077.

The spelling of 700639 in words is "seven hundred thousand, six hundred thirty-nine".