641410009 has 2 divisors, whose sum is σ = 641410010. Its totient is φ = 641410008.

The previous prime is 641409997. The next prime is 641410013. The reversal of 641410009 is 900014146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442176784 + 199233225 = 21028^2 + 14115^2 .

It is a cyclic number.

It is not a de Polignac number, because 641410009 - 2⁹ = 641409497 is a prime.

It is a super-2 number, since 2×641410009² = 822813599290760162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641410019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320705004 + 320705005.

It is an arithmetic number, because the mean of its divisors is an integer number (320705005).

Almost surely, 2^641410009 is an apocalyptic number.

It is an amenable number.

641410009 is a deficient number, since it is larger than the sum of its proper divisors (1).

641410009 is an equidigital number, since it uses as much as digits as its factorization.

641410009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 641410009 is about 25326.0736988583. The cubic root of 641410009 is about 862.4062810442.

The spelling of 641410009 in words is "six hundred forty-one million, four hundred ten thousand, nine".