610440643 has 2 divisors, whose sum is σ = 610440644. Its totient is φ = 610440642.

The previous prime is 610440583. The next prime is 610440647. The reversal of 610440643 is 346044016.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 610440643 - 2¹³ = 610432451 is a prime.

It is not a weakly prime, because it can be changed into another prime (610440647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305220321 + 305220322.

It is an arithmetic number, because the mean of its divisors is an integer number (305220322).

Almost surely, 2^610440643 is an apocalyptic number.

610440643 is a deficient number, since it is larger than the sum of its proper divisors (1).

610440643 is an equidigital number, since it uses as much as digits as its factorization.

610440643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 610440643 is about 24707.0970168492. The cubic root of 610440643 is about 848.2967706649.

Adding to 610440643 its reverse (346044016), we get a palindrome (956484659).

The spelling of 610440643 in words is "six hundred ten million, four hundred forty thousand, six hundred forty-three".