139634 has 12 divisors (see below), whose sum is σ = 230622. Its totient is φ = 63360.

The previous prime is 139627. The next prime is 139661. The reversal of 139634 is 436931.

139634 = T₇₅ + T₇₆ + ... + T₁₀₇.

It can be written as a sum of positive squares in only one way, i.e., 75625 + 64009 = 275^2 + 253^2 .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

139634 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47 + ... + 530.

2¹³⁹⁶³⁴ is an apocalyptic number.

139634 is a deficient number, since it is larger than the sum of its proper divisors (90988).

139634 is a wasteful number, since it uses less digits than its factorization.

139634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 590 counting only the distinct ones).

The product of its digits is 1944, while the sum is 26.

The square root of 139634 is about 373.6763305322. The cubic root of 139634 is about 51.8796526528.

The spelling of 139634 in words is "one hundred thirty-nine thousand, six hundred thirty-four".