7172923 has 2 divisors, whose sum is σ = 7172924. Its totient is φ = 7172922.

The previous prime is 7172911. The next prime is 7172927. The reversal of 7172923 is 3292717.

It is a strong prime.

It is an emirp because it is prime and its reverse (3292717) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7172923 - 2⁹ = 7172411 is a prime.

It is a d-powerful number, because it can be written as 7⁷ + 1 + 7⁸ + 2⁹ + 9³ + 2¹⁹ + 3¹⁰ .

It is not a weakly prime, because it can be changed into another prime (7172927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3586461 + 3586462.

It is an arithmetic number, because the mean of its divisors is an integer number (3586462).

Almost surely, 2^7172923 is an apocalyptic number.

7172923 is a deficient number, since it is larger than the sum of its proper divisors (1).

7172923 is an equidigital number, since it uses as much as digits as its factorization.

7172923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 31.

The square root of 7172923 is about 2678.2313193598. The cubic root of 7172923 is about 192.8555121425.

The spelling of 7172923 in words is "seven million, one hundred seventy-two thousand, nine hundred twenty-three".