610439561 has 2 divisors, whose sum is σ = 610439562. Its totient is φ = 610439560.

The previous prime is 610439513. The next prime is 610439563. The reversal of 610439561 is 165934016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 587820025 + 22619536 = 24245^2 + 4756^2 .

It is a cyclic number.

It is not a de Polignac number, because 610439561 - 2¹⁰ = 610438537 is a prime.

Together with 610439563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (610439563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305219780 + 305219781.

It is an arithmetic number, because the mean of its divisors is an integer number (305219781).

Almost surely, 2^610439561 is an apocalyptic number.

It is an amenable number.

610439561 is a deficient number, since it is larger than the sum of its proper divisors (1).

610439561 is an equidigital number, since it uses as much as digits as its factorization.

610439561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 610439561 is about 24707.0751202970. The cubic root of 610439561 is about 848.2962694654.

The spelling of 610439561 in words is "six hundred ten million, four hundred thirty-nine thousand, five hundred sixty-one".