145368217 has 2 divisors, whose sum is σ = 145368218. Its totient is φ = 145368216.

The previous prime is 145368199. The next prime is 145368229. The reversal of 145368217 is 712863541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106729561 + 38638656 = 10331^2 + 6216^2 .

It is a cyclic number.

It is not a de Polignac number, because 145368217 - 2⁷ = 145368089 is a prime.

It is a super-2 number, since 2×145368217² = 42263837027518178, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145368287) 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, 72684108 + 72684109.

It is an arithmetic number, because the mean of its divisors is an integer number (72684109).

Almost surely, 2^145368217 is an apocalyptic number.

It is an amenable number.

145368217 is a deficient number, since it is larger than the sum of its proper divisors (1).

145368217 is an equidigital number, since it uses as much as digits as its factorization.

145368217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 145368217 is about 12056.8742632575. The cubic root of 145368217 is about 525.8031148810.

The spelling of 145368217 in words is "one hundred forty-five million, three hundred sixty-eight thousand, two hundred seventeen".