145668697 has 2 divisors, whose sum is σ = 145668698. Its totient is φ = 145668696.

The previous prime is 145668689. The next prime is 145668707. The reversal of 145668697 is 796866541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137851081 + 7817616 = 11741^2 + 2796^2 .

It is an emirp because it is prime and its reverse (796866541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145668697 - 2³ = 145668689 is a prime.

It is not a weakly prime, because it can be changed into another prime (145668617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72834348 + 72834349.

It is an arithmetic number, because the mean of its divisors is an integer number (72834349).

Almost surely, 2^145668697 is an apocalyptic number.

It is an amenable number.

145668697 is a deficient number, since it is larger than the sum of its proper divisors (1).

145668697 is an equidigital number, since it uses as much as digits as its factorization.

145668697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 52.

The square root of 145668697 is about 12069.3287717255. The cubic root of 145668697 is about 526.1651485938.

The spelling of 145668697 in words is "one hundred forty-five million, six hundred sixty-eight thousand, six hundred ninety-seven".