139633705 has 4 divisors (see below), whose sum is σ = 167560452. Its totient is φ = 111706960.

The previous prime is 139633693. The next prime is 139633721. The reversal of 139633705 is 507336931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67502656 + 72131049 = 8216^2 + 8493^2 .

It is not a de Polignac number, because 139633705 - 2¹⁷ = 139502633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13963366 + ... + 13963375.

It is an arithmetic number, because the mean of its divisors is an integer number (41890113).

Almost surely, 2^139633705 is an apocalyptic number.

It is an amenable number.

139633705 is a deficient number, since it is larger than the sum of its proper divisors (27926747).

139633705 is an equidigital number, since it uses as much as digits as its factorization.

139633705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27926746.

The product of its (nonzero) digits is 51030, while the sum is 37.

The square root of 139633705 is about 11816.6706393975. The cubic root of 139633705 is about 518.7961611799.

The spelling of 139633705 in words is "one hundred thirty-nine million, six hundred thirty-three thousand, seven hundred five".