138430161 has 8 divisors (see below), whose sum is σ = 205081760. Its totient is φ = 92286756.

The previous prime is 138430151. The next prime is 138430163. The reversal of 138430161 is 161034831.

It is not a de Polignac number, because 138430161 - 2¹⁵ = 138397393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5127043 = 138430161 / (1 + 3 + 8 + 4 + 3 + 0 + 1 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138430163) 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, 2563495 + ... + 2563548.

It is an arithmetic number, because the mean of its divisors is an integer number (25635220).

Almost surely, 2^138430161 is an apocalyptic number.

It is an amenable number.

138430161 is a deficient number, since it is larger than the sum of its proper divisors (66651599).

138430161 is an equidigital number, since it uses as much as digits as its factorization.

138430161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5127052 (or 5127046 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 138430161 is about 11765.6347470079. The cubic root of 138430161 is about 517.3013057837.

Adding to 138430161 its reverse (161034831), we get a palindrome (299464992).

The spelling of 138430161 in words is "one hundred thirty-eight million, four hundred thirty thousand, one hundred sixty-one".