3644746397 has 2 divisors, whose sum is σ = 3644746398. Its totient is φ = 3644746396.

The previous prime is 3644746393. The next prime is 3644746403. The reversal of 3644746397 is 7936474463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3182539396 + 462207001 = 56414^2 + 21499^2 .

It is a cyclic number.

It is not a de Polignac number, because 3644746397 - 2² = 3644746393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3644746393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822373198 + 1822373199.

It is an arithmetic number, because the mean of its divisors is an integer number (1822373199).

Almost surely, 2^3644746397 is an apocalyptic number.

It is an amenable number.

3644746397 is a deficient number, since it is larger than the sum of its proper divisors (1).

3644746397 is an equidigital number, since it uses as much as digits as its factorization.

3644746397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9144576, while the sum is 53.

The square root of 3644746397 is about 60371.7350835637. The cubic root of 3644746397 is about 1538.9426594092.

The spelling of 3644746397 in words is "three billion, six hundred forty-four million, seven hundred forty-six thousand, three hundred ninety-seven".