137968438 has 4 divisors (see below), whose sum is σ = 206952660. Its totient is φ = 68984218.

The previous prime is 137968427. The next prime is 137968451. The reversal of 137968438 is 834869731.

It is a happy number.

137968438 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: 834869731 = 739 ⋅1129729.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 137968391 and 137968400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34492108 + ... + 34492111.

It is an arithmetic number, because the mean of its divisors is an integer number (51738165).

Almost surely, 2^137968438 is an apocalyptic number.

137968438 is a deficient number, since it is larger than the sum of its proper divisors (68984222).

137968438 is an equidigital number, since it uses as much as digits as its factorization.

137968438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68984221.

The product of its digits is 870912, while the sum is 49.

The square root of 137968438 is about 11745.9966797203. The cubic root of 137968438 is about 516.7255257722.

The spelling of 137968438 in words is "one hundred thirty-seven million, nine hundred sixty-eight thousand, four hundred thirty-eight".