45172289 has 2 divisors, whose sum is σ = 45172290. Its totient is φ = 45172288.

The previous prime is 45172273. The next prime is 45172307. The reversal of 45172289 is 98227154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24850225 + 20322064 = 4985^2 + 4508^2 .

It is a cyclic number.

It is not a de Polignac number, because 45172289 - 2⁴ = 45172273 is a prime.

It is not a weakly prime, because it can be changed into another prime (45172189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22586144 + 22586145.

It is an arithmetic number, because the mean of its divisors is an integer number (22586145).

Almost surely, 2^45172289 is an apocalyptic number.

It is an amenable number.

45172289 is a deficient number, since it is larger than the sum of its proper divisors (1).

45172289 is an equidigital number, since it uses as much as digits as its factorization.

45172289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 45172289 is about 6721.0333282911. The cubic root of 45172289 is about 356.1426883512.

The spelling of 45172289 in words is "forty-five million, one hundred seventy-two thousand, two hundred eighty-nine".