1645146317 has 2 divisors, whose sum is σ = 1645146318. Its totient is φ = 1645146316.

The previous prime is 1645146313. The next prime is 1645146319. The reversal of 1645146317 is 7136415461.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1077086761 + 568059556 = 32819^2 + 23834^2 .

It is a cyclic number.

It is not a de Polignac number, because 1645146317 - 2² = 1645146313 is a prime.

Together with 1645146319, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1645146313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822573158 + 822573159.

It is an arithmetic number, because the mean of its divisors is an integer number (822573159).

Almost surely, 2^1645146317 is an apocalyptic number.

It is an amenable number.

1645146317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645146317 is an equidigital number, since it uses as much as digits as its factorization.

1645146317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 1645146317 is about 40560.4033140697. The cubic root of 1645146317 is about 1180.5059395575.

The spelling of 1645146317 in words is "one billion, six hundred forty-five million, one hundred forty-six thousand, three hundred seventeen".