641537383 has 2 divisors, whose sum is σ = 641537384. Its totient is φ = 641537382.

The previous prime is 641537371. The next prime is 641537431. The reversal of 641537383 is 383735146.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641537383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641537353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320768691 + 320768692.

It is an arithmetic number, because the mean of its divisors is an integer number (320768692).

Almost surely, 2^641537383 is an apocalyptic number.

641537383 is a deficient number, since it is larger than the sum of its proper divisors (1).

641537383 is an equidigital number, since it uses as much as digits as its factorization.

641537383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 40.

The square root of 641537383 is about 25328.5882551713. The cubic root of 641537383 is about 862.4633640673.

The spelling of 641537383 in words is "six hundred forty-one million, five hundred thirty-seven thousand, three hundred eighty-three".