138864319 has 6 divisors (see below), whose sum is σ = 152636120. Its totient is φ = 126240180.

The previous prime is 138864307. The next prime is 138864343. The reversal of 138864319 is 913468831.

It is not a de Polignac number, because 138864319 - 2⁹ = 138863807 is a prime.

It is a super-2 number, since 2×138864319² = 38566598182667522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138864379) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 573699 + ... + 573940.

Almost surely, 2^138864319 is an apocalyptic number.

138864319 is a deficient number, since it is larger than the sum of its proper divisors (13771801).

138864319 is a wasteful number, since it uses less digits than its factorization.

138864319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147661 (or 1147650 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 138864319 is about 11784.0705615674. The cubic root of 138864319 is about 517.8415447818.

The spelling of 138864319 in words is "one hundred thirty-eight million, eight hundred sixty-four thousand, three hundred nineteen".