138201749 has 8 divisors (see below), whose sum is σ = 158016768. Its totient is φ = 118404720.

The previous prime is 138201727. The next prime is 138201773. The reversal of 138201749 is 947102831.

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

It is a de Polignac number, because none of the positive numbers 2^k-138201749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138201799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24164 + ... + 29330.

It is an arithmetic number, because the mean of its divisors is an integer number (19752096).

Almost surely, 2^138201749 is an apocalyptic number.

It is an amenable number.

138201749 is a deficient number, since it is larger than the sum of its proper divisors (19815019).

138201749 is an equidigital number, since it uses as much as digits as its factorization.

138201749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8995.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 138201749 is about 11755.9239960115. The cubic root of 138201749 is about 517.0166306520.

The spelling of 138201749 in words is "one hundred thirty-eight million, two hundred one thousand, seven hundred forty-nine".