138319097 has 4 divisors (see below), whose sum is σ = 158078976. Its totient is φ = 118559220.

The previous prime is 138319087. The next prime is 138319163. The reversal of 138319097 is 790913831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 790913831 = 17 ⋅46524343.

It is a cyclic number.

It is not a de Polignac number, because 138319097 - 2¹⁰ = 138318073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138319037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9879929 + ... + 9879942.

It is an arithmetic number, because the mean of its divisors is an integer number (39519744).

Almost surely, 2^138319097 is an apocalyptic number.

It is an amenable number.

138319097 is a deficient number, since it is larger than the sum of its proper divisors (19759879).

138319097 is an equidigital number, since it uses as much as digits as its factorization.

138319097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19759878.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 138319097 is about 11760.9139525804. The cubic root of 138319097 is about 517.1629233101.

The spelling of 138319097 in words is "one hundred thirty-eight million, three hundred nineteen thousand, ninety-seven".