9049139923 has 2 divisors, whose sum is σ = 9049139924. Its totient is φ = 9049139922.

The previous prime is 9049139921. The next prime is 9049139947. The reversal of 9049139923 is 3299319409.

It is a weak prime.

It is an emirp because it is prime and its reverse (3299319409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9049139923 - 2¹ = 9049139921 is a prime.

Together with 9049139921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9049139921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4524569961 + 4524569962.

It is an arithmetic number, because the mean of its divisors is an integer number (4524569962).

Almost surely, 2^9049139923 is an apocalyptic number.

9049139923 is a deficient number, since it is larger than the sum of its proper divisors (1).

9049139923 is an equidigital number, since it uses as much as digits as its factorization.

9049139923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 49.

The square root of 9049139923 is about 95126.9673804437. The cubic root of 9049139923 is about 2083.8627004537.

The spelling of 9049139923 in words is "nine billion, forty-nine million, one hundred thirty-nine thousand, nine hundred twenty-three".