1645132297 has 2 divisors, whose sum is σ = 1645132298. Its totient is φ = 1645132296.

The previous prime is 1645132277. The next prime is 1645132351. The reversal of 1645132297 is 7922315461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1355417856 + 289714441 = 36816^2 + 17021^2 .

It is an emirp because it is prime and its reverse (7922315461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1645132297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1645132207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822566148 + 822566149.

It is an arithmetic number, because the mean of its divisors is an integer number (822566149).

Almost surely, 2^1645132297 is an apocalyptic number.

It is an amenable number.

1645132297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645132297 is an equidigital number, since it uses as much as digits as its factorization.

1645132297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 1645132297 is about 40560.2304850453. The cubic root of 1645132297 is about 1180.5025861090.

The spelling of 1645132297 in words is "one billion, six hundred forty-five million, one hundred thirty-two thousand, two hundred ninety-seven".