635139 has 6 divisors (see below), whose sum is σ = 917436. Its totient is φ = 423420.

The previous prime is 635119. The next prime is 635147. The reversal of 635139 is 931536.

It is not a de Polignac number, because 635139 - 2¹¹ = 633091 is a prime.

635139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (635119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35277 + ... + 35294.

It is an arithmetic number, because the mean of its divisors is an integer number (152906).

2⁶³⁵¹³⁹ is an apocalyptic number.

635139 is a deficient number, since it is larger than the sum of its proper divisors (282297).

635139 is a wasteful number, since it uses less digits than its factorization.

635139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70577 (or 70574 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 635139 is about 796.9560841100. The cubic root of 635139 is about 85.9586514768.

The spelling of 635139 in words is "six hundred thirty-five thousand, one hundred thirty-nine".