9138072919 has 2 divisors, whose sum is σ = 9138072920. Its totient is φ = 9138072918.

The previous prime is 9138072899. The next prime is 9138072943. The reversal of 9138072919 is 9192708319.

It is a weak prime.

It is an emirp because it is prime and its reverse (9192708319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9138072919 - 2⁵ = 9138072887 is a prime.

It is a super-2 number, since 2×9138072919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9138072319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4569036459 + 4569036460.

It is an arithmetic number, because the mean of its divisors is an integer number (4569036460).

Almost surely, 2^9138072919 is an apocalyptic number.

9138072919 is a deficient number, since it is larger than the sum of its proper divisors (1).

9138072919 is an equidigital number, since it uses as much as digits as its factorization.

9138072919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 9138072919 is about 95593.2681677952. The cubic root of 9138072919 is about 2090.6670427944.

The spelling of 9138072919 in words is "nine billion, one hundred thirty-eight million, seventy-two thousand, nine hundred nineteen".