138151409 has 8 divisors (see below), whose sum is σ = 157263552. Its totient is φ = 120131440.

The previous prime is 138151393. The next prime is 138151411. The reversal of 138151409 is 904151831.

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

It is not a de Polignac number, because 138151409 - 2⁴ = 138151393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138151439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272774 + ... + 273279.

It is an arithmetic number, because the mean of its divisors is an integer number (19657944).

Almost surely, 2^138151409 is an apocalyptic number.

It is an amenable number.

138151409 is a deficient number, since it is larger than the sum of its proper divisors (19112143).

138151409 is a wasteful number, since it uses less digits than its factorization.

138151409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546087.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 138151409 is about 11753.7827527992. The cubic root of 138151409 is about 516.9538485766.

The spelling of 138151409 in words is "one hundred thirty-eight million, one hundred fifty-one thousand, four hundred nine".