138197674 has 8 divisors (see below), whose sum is σ = 208067940. Its totient is φ = 68841696.

The previous prime is 138197671. The next prime is 138197681. The reversal of 138197674 is 476791831.

138197674 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 121330225 + 16867449 = 11015^2 + 4107^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (138197671) 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, 127899 + ... + 128974.

Almost surely, 2^138197674 is an apocalyptic number.

138197674 is a deficient number, since it is larger than the sum of its proper divisors (69870266).

138197674 is a wasteful number, since it uses less digits than its factorization.

138197674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257144.

The product of its digits is 254016, while the sum is 46.

The square root of 138197674 is about 11755.7506778598. The cubic root of 138197674 is about 517.0115490388.

The spelling of 138197674 in words is "one hundred thirty-eight million, one hundred ninety-seven thousand, six hundred seventy-four".