701639 has 4 divisors (see below), whose sum is σ = 703560. Its totient is φ = 699720.

The previous prime is 701629. The next prime is 701653. The reversal of 701639 is 936107.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936107 = 31 ⋅30197.

It is a cyclic number.

It is not a de Polignac number, because 701639 - 2⁸ = 701383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 701639.

It is not an unprimeable number, because it can be changed into a prime (701609) 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, 224 + ... + 1205.

It is an arithmetic number, because the mean of its divisors is an integer number (175890).

2⁷⁰¹⁶³⁹ is an apocalyptic number.

701639 is a deficient number, since it is larger than the sum of its proper divisors (1921).

701639 is a wasteful number, since it uses less digits than its factorization.

701639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 701639 is about 837.6389436983. The cubic root of 701639 is about 88.8596449517.

The spelling of 701639 in words is "seven hundred one thousand, six hundred thirty-nine".