145585109 has 2 divisors, whose sum is σ = 145585110. Its totient is φ = 145585108.

The previous prime is 145585079. The next prime is 145585123. The reversal of 145585109 is 901585541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143400625 + 2184484 = 11975^2 + 1478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145585109 is a prime.

It is equal to p_8209649 and since 145585109 and 8209649 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145585129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72792554 + 72792555.

It is an arithmetic number, because the mean of its divisors is an integer number (72792555).

Almost surely, 2^145585109 is an apocalyptic number.

It is an amenable number.

145585109 is a deficient number, since it is larger than the sum of its proper divisors (1).

145585109 is an equidigital number, since it uses as much as digits as its factorization.

145585109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 38.

The square root of 145585109 is about 12065.8654476171. The cubic root of 145585109 is about 526.0644875081.

The spelling of 145585109 in words is "one hundred forty-five million, five hundred eighty-five thousand, one hundred nine".