138519926 has 4 divisors (see below), whose sum is σ = 207779892. Its totient is φ = 69259962.

The previous prime is 138519923. The next prime is 138519929. The reversal of 138519926 is 629915831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 629915831 = 2053 ⋅306827.

It is an interprime number because it is at equal distance from previous prime (138519923) and next prime (138519929).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138519923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34629980 + ... + 34629983.

It is an arithmetic number, because the mean of its divisors is an integer number (51944973).

Almost surely, 2^138519926 is an apocalyptic number.

138519926 is a deficient number, since it is larger than the sum of its proper divisors (69259966).

138519926 is an equidigital number, since it uses as much as digits as its factorization.

138519926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69259965.

The product of its digits is 116640, while the sum is 44.

The square root of 138519926 is about 11769.4488401114. The cubic root of 138519926 is about 517.4130962537.

The spelling of 138519926 in words is "one hundred thirty-eight million, five hundred nineteen thousand, nine hundred twenty-six".