641049047 has 2 divisors, whose sum is σ = 641049048. Its totient is φ = 641049046.

The previous prime is 641049029. The next prime is 641049067. The reversal of 641049047 is 740940146.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641049047 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 641048998 and 641049016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641049007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320524523 + 320524524.

It is an arithmetic number, because the mean of its divisors is an integer number (320524524).

Almost surely, 2^641049047 is an apocalyptic number.

641049047 is a deficient number, since it is larger than the sum of its proper divisors (1).

641049047 is an equidigital number, since it uses as much as digits as its factorization.

641049047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 641049047 is about 25318.9464038297. The cubic root of 641049047 is about 862.2444738251.

The spelling of 641049047 in words is "six hundred forty-one million, forty-nine thousand, forty-seven".