145098209 has 2 divisors, whose sum is σ = 145098210. Its totient is φ = 145098208.

The previous prime is 145098133. The next prime is 145098229. The reversal of 145098209 is 902890541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113209600 + 31888609 = 10640^2 + 5647^2 .

It is a cyclic number.

It is not a de Polignac number, because 145098209 - 2¹² = 145094113 is a prime.

It is a Chen prime.

It is equal to p_8183837 and since 145098209 and 8183837 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (145098229) 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, 72549104 + 72549105.

It is an arithmetic number, because the mean of its divisors is an integer number (72549105).

Almost surely, 2^145098209 is an apocalyptic number.

It is an amenable number.

145098209 is a deficient number, since it is larger than the sum of its proper divisors (1).

145098209 is an equidigital number, since it uses as much as digits as its factorization.

145098209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 145098209 is about 12045.6717952964. The cubic root of 145098209 is about 525.4773695873.

The spelling of 145098209 in words is "one hundred forty-five million, ninety-eight thousand, two hundred nine".