9138778319 has 16 divisors (see below), whose sum is σ = 10036846080. Its totient is φ = 8252060160.

The previous prime is 9138778267. The next prime is 9138778321.

9138778319 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 9138778319 - 2²⁰ = 9137729743 is a prime.

It is a super-2 number, since 2×9138778319² (a number of 21 digits) 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 (9138778399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1523444 + ... + 1529430.

It is an arithmetic number, because the mean of its divisors is an integer number (627302880).

Almost surely, 2^9138778319 is an apocalyptic number.

9138778319 is a deficient number, since it is larger than the sum of its proper divisors (898067761).

9138778319 is a wasteful number, since it uses less digits than its factorization.

9138778319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6910.

The product of its digits is 2286144, while the sum is 56.

The square root of 9138778319 is about 95596.9576869473. The cubic root of 9138778319 is about 2090.7208367252.

The spelling of 9138778319 in words is "nine billion, one hundred thirty-eight million, seven hundred seventy-eight thousand, three hundred nineteen".