138682274 has 4 divisors (see below), whose sum is σ = 208023414. Its totient is φ = 69341136.

The previous prime is 138682259. The next prime is 138682279. The reversal of 138682274 is 472286831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 472286831 = 41 ⋅11519191.

It can be written as a sum of positive squares in only one way, i.e., 82537225 + 56145049 = 9085^2 + 7493^2 .

It is a super-2 number, since 2×138682274² = 38465546243622152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138682279) 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 as a sum of consecutive naturals, namely, 34670567 + ... + 34670570.

Almost surely, 2^138682274 is an apocalyptic number.

138682274 is a deficient number, since it is larger than the sum of its proper divisors (69341140).

138682274 is an equidigital number, since it uses as much as digits as its factorization.

138682274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69341139.

The product of its digits is 129024, while the sum is 41.

The square root of 138682274 is about 11776.3438298990. The cubic root of 138682274 is about 517.6151566797.

The spelling of 138682274 in words is "one hundred thirty-eight million, six hundred eighty-two thousand, two hundred seventy-four".