138758374 has 4 divisors (see below), whose sum is σ = 208137564. Its totient is φ = 69379186.

The previous prime is 138758341. The next prime is 138758419. The reversal of 138758374 is 473857831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 473857831 = 6997 ⋅67723.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 34689592 + ... + 34689595.

It is an arithmetic number, because the mean of its divisors is an integer number (52034391).

Almost surely, 2^138758374 is an apocalyptic number.

138758374 is a deficient number, since it is larger than the sum of its proper divisors (69379190).

138758374 is an equidigital number, since it uses as much as digits as its factorization.

138758374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69379189.

The product of its digits is 564480, while the sum is 46.

The square root of 138758374 is about 11779.5744405305. The cubic root of 138758374 is about 517.7098174451.

The spelling of 138758374 in words is "one hundred thirty-eight million, seven hundred fifty-eight thousand, three hundred seventy-four".