146643397 has 2 divisors, whose sum is σ = 146643398. Its totient is φ = 146643396.

The previous prime is 146643389. The next prime is 146643437. The reversal of 146643397 is 793346641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130850721 + 15792676 = 11439^2 + 3974^2 .

It is an emirp because it is prime and its reverse (793346641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 146643397 - 2³ = 146643389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146643307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73321698 + 73321699.

It is an arithmetic number, because the mean of its divisors is an integer number (73321699).

Almost surely, 2^146643397 is an apocalyptic number.

It is an amenable number.

146643397 is a deficient number, since it is larger than the sum of its proper divisors (1).

146643397 is an equidigital number, since it uses as much as digits as its factorization.

146643397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 43.

The square root of 146643397 is about 12109.6406635375. The cubic root of 146643397 is about 527.3361014582.

The spelling of 146643397 in words is "one hundred forty-six million, six hundred forty-three thousand, three hundred ninety-seven".