139126639 has 8 divisors (see below), whose sum is σ = 141423408. Its totient is φ = 136836480.

The previous prime is 139126633. The next prime is 139126679. The reversal of 139126639 is 936621931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139126639 - 2¹⁷ = 138995567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139126633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57849 + ... + 60205.

It is an arithmetic number, because the mean of its divisors is an integer number (17677926).

Almost surely, 2^139126639 is an apocalyptic number.

139126639 is a deficient number, since it is larger than the sum of its proper divisors (2296769).

139126639 is an equidigital number, since it uses as much as digits as its factorization.

139126639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3305.

The product of its digits is 52488, while the sum is 40.

The square root of 139126639 is about 11795.1955897306. The cubic root of 139126639 is about 518.1674138240.

The spelling of 139126639 in words is "one hundred thirty-nine million, one hundred twenty-six thousand, six hundred thirty-nine".