145730197 has 2 divisors, whose sum is σ = 145730198. Its totient is φ = 145730196.

The previous prime is 145730131. The next prime is 145730201. The reversal of 145730197 is 791037541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143856036 + 1874161 = 11994^2 + 1369^2 .

It is a cyclic number.

It is not a de Polignac number, because 145730197 - 2¹⁹ = 145205909 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145730107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72865098 + 72865099.

It is an arithmetic number, because the mean of its divisors is an integer number (72865099).

Almost surely, 2^145730197 is an apocalyptic number.

It is an amenable number.

145730197 is a deficient number, since it is larger than the sum of its proper divisors (1).

145730197 is an equidigital number, since it uses as much as digits as its factorization.

145730197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 145730197 is about 12071.8762833290. The cubic root of 145730197 is about 526.2391855568.

The spelling of 145730197 in words is "one hundred forty-five million, seven hundred thirty thousand, one hundred ninety-seven".