138708154 has 8 divisors (see below), whose sum is σ = 224067060. Its totient is φ = 64019136.

The previous prime is 138708149. The next prime is 138708169. The reversal of 138708154 is 451807831.

It can be written as a sum of positive squares in 2 ways, for example, as 136258929 + 2449225 = 11673^2 + 1565^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2667439 + ... + 2667490.

Almost surely, 2^138708154 is an apocalyptic number.

138708154 is a deficient number, since it is larger than the sum of its proper divisors (85358906).

138708154 is a wasteful number, since it uses less digits than its factorization.

138708154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5334944.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 138708154 is about 11777.4425916665. The cubic root of 138708154 is about 517.6473526883.

The spelling of 138708154 in words is "one hundred thirty-eight million, seven hundred eight thousand, one hundred fifty-four".