138219697 has 8 divisors (see below), whose sum is σ = 172325952. Its totient is φ = 107703600.

The previous prime is 138219691. The next prime is 138219703. The reversal of 138219697 is 796912831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (138219691) and next prime (138219703).

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

It is a cyclic number.

It is not a de Polignac number, because 138219697 - 2¹⁵ = 138186929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138219691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 897454 + ... + 897607.

It is an arithmetic number, because the mean of its divisors is an integer number (21540744).

Almost surely, 2^138219697 is an apocalyptic number.

It is an amenable number.

138219697 is a deficient number, since it is larger than the sum of its proper divisors (34106255).

138219697 is a wasteful number, since it uses less digits than its factorization.

138219697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795079.

The product of its digits is 163296, while the sum is 46.

The square root of 138219697 is about 11756.6873310470. The cubic root of 138219697 is about 517.0390110075.

The spelling of 138219697 in words is "one hundred thirty-eight million, two hundred nineteen thousand, six hundred ninety-seven".