172230073 has 2 divisors, whose sum is σ = 172230074. Its totient is φ = 172230072.

The previous prime is 172230059. The next prime is 172230103. The reversal of 172230073 is 370032271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94225849 + 78004224 = 9707^2 + 8832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172230073 is a prime.

It is not a weakly prime, because it can be changed into another prime (172230173) 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, 86115036 + 86115037.

It is an arithmetic number, because the mean of its divisors is an integer number (86115037).

Almost surely, 2^172230073 is an apocalyptic number.

It is an amenable number.

172230073 is a deficient number, since it is larger than the sum of its proper divisors (1).

172230073 is an equidigital number, since it uses as much as digits as its factorization.

172230073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 172230073 is about 13123.6455682101. The cubic root of 172230073 is about 556.3776321525.

The spelling of 172230073 in words is "one hundred seventy-two million, two hundred thirty thousand, seventy-three".