139148633 has 4 divisors (see below), whose sum is σ = 149852388. Its totient is φ = 128444880.

The previous prime is 139148617. The next prime is 139148663. The reversal of 139148633 is 336841931.

It is a happy number.

139148633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 336841931 = 29 ⋅11615239.

It can be written as a sum of positive squares in 2 ways, for example, as 38105929 + 101042704 = 6173^2 + 10052^2 .

It is a cyclic number.

It is not a de Polignac number, because 139148633 - 2⁴ = 139148617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139148663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5351858 + ... + 5351883.

It is an arithmetic number, because the mean of its divisors is an integer number (37463097).

Almost surely, 2^139148633 is an apocalyptic number.

139148633 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

139148633 is a deficient number, since it is larger than the sum of its proper divisors (10703755).

139148633 is a wasteful number, since it uses less digits than its factorization.

139148633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10703754.

The product of its digits is 46656, while the sum is 38.

The square root of 139148633 is about 11796.1278816398. The cubic root of 139148633 is about 518.1947174223.

The spelling of 139148633 in words is "one hundred thirty-nine million, one hundred forty-eight thousand, six hundred thirty-three".