65138319 has 12 divisors (see below), whose sum is σ = 94767400. Its totient is φ = 43112304.

The previous prime is 65138303. The next prime is 65138341. The reversal of 65138319 is 91383156.

It is a happy number.

It is not a de Polignac number, because 65138319 - 2⁴ = 65138303 is a prime.

It is a super-2 number, since 2×65138319² = 8486001204291522, 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 (65138399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24784 + ... + 27285.

Almost surely, 2^65138319 is an apocalyptic number.

65138319 is a deficient number, since it is larger than the sum of its proper divisors (29629081).

65138319 is a wasteful number, since it uses less digits than its factorization.

65138319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52214 (or 52211 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 65138319 is about 8070.8313698156. The cubic root of 65138319 is about 402.3575752149.

It can be divided in two parts, 65 and 138319, that added together give a square (138384 = 372²).

The spelling of 65138319 in words is "sixty-five million, one hundred thirty-eight thousand, three hundred nineteen".