45172273 has 2 divisors, whose sum is σ = 45172274. Its totient is φ = 45172272.

The previous prime is 45172243. The next prime is 45172289. The reversal of 45172273 is 37227154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44930209 + 242064 = 6703^2 + 492^2 .

It is a cyclic number.

It is not a de Polignac number, because 45172273 - 2¹³ = 45164081 is a prime.

It is not a weakly prime, because it can be changed into another prime (45172243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22586136 + 22586137.

It is an arithmetic number, because the mean of its divisors is an integer number (22586137).

Almost surely, 2^45172273 is an apocalyptic number.

It is an amenable number.

45172273 is a deficient number, since it is larger than the sum of its proper divisors (1).

45172273 is an equidigital number, since it uses as much as digits as its factorization.

45172273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 31.

The square root of 45172273 is about 6721.0321379979. The cubic root of 45172273 is about 356.1426463027.

The spelling of 45172273 in words is "forty-five million, one hundred seventy-two thousand, two hundred seventy-three".