138958753 has 4 divisors (see below), whose sum is σ = 138997440. Its totient is φ = 138920068.

The previous prime is 138958751. The next prime is 138958763. The reversal of 138958753 is 357859831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 357859831 = 7 ⋅51122833.

It is a cyclic number.

It is not a de Polignac number, because 138958753 - 2¹ = 138958751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138958697 and 138958706.

It is not an unprimeable number, because it can be changed into a prime (138958751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13333 + ... + 21346.

It is an arithmetic number, because the mean of its divisors is an integer number (34749360).

Almost surely, 2^138958753 is an apocalyptic number.

It is an amenable number.

138958753 is a deficient number, since it is larger than the sum of its proper divisors (38687).

138958753 is an equidigital number, since it uses as much as digits as its factorization.

138958753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38686.

The product of its digits is 907200, while the sum is 49.

The square root of 138958753 is about 11788.0767303237. The cubic root of 138958753 is about 517.9589033848.

The spelling of 138958753 in words is "one hundred thirty-eight million, nine hundred fifty-eight thousand, seven hundred fifty-three".