3645321349 has 2 divisors, whose sum is σ = 3645321350. Its totient is φ = 3645321348.

The previous prime is 3645321347. The next prime is 3645321467. The reversal of 3645321349 is 9431235463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3380608449 + 264712900 = 58143^2 + 16270^2 .

It is a cyclic number.

It is not a de Polignac number, because 3645321349 - 2¹ = 3645321347 is a prime.

Together with 3645321347, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3645321343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822660674 + 1822660675.

It is an arithmetic number, because the mean of its divisors is an integer number (1822660675).

Almost surely, 2^3645321349 is an apocalyptic number.

It is an amenable number.

3645321349 is a deficient number, since it is larger than the sum of its proper divisors (1).

3645321349 is an equidigital number, since it uses as much as digits as its factorization.

3645321349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 40.

The square root of 3645321349 is about 60376.4966605384. The cubic root of 3645321349 is about 1539.0235769401.

The spelling of 3645321349 in words is "three billion, six hundred forty-five million, three hundred twenty-one thousand, three hundred forty-nine".