9172148549 has 2 divisors, whose sum is σ = 9172148550. Its totient is φ = 9172148548.

The previous prime is 9172148537. The next prime is 9172148593. The reversal of 9172148549 is 9458412719.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8738884324 + 433264225 = 93482^2 + 20815^2 .

It is a cyclic number.

It is not a de Polignac number, because 9172148549 - 2¹⁶ = 9172083013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9172148497 and 9172148506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9172148509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4586074274 + 4586074275.

It is an arithmetic number, because the mean of its divisors is an integer number (4586074275).

Almost surely, 2^9172148549 is an apocalyptic number.

It is an amenable number.

9172148549 is a deficient number, since it is larger than the sum of its proper divisors (1).

9172148549 is an equidigital number, since it uses as much as digits as its factorization.

9172148549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 50.

The square root of 9172148549 is about 95771.3346936337. The cubic root of 9172148549 is about 2093.2624998655.

The spelling of 9172148549 in words is "nine billion, one hundred seventy-two million, one hundred forty-eight thousand, five hundred forty-nine".