610025621 has 2 divisors, whose sum is σ = 610025622. Its totient is φ = 610025620.

The previous prime is 610025617. The next prime is 610025627. The reversal of 610025621 is 126520016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427910596 + 182115025 = 20686^2 + 13495^2 .

It is a cyclic number.

It is not a de Polignac number, because 610025621 - 2² = 610025617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (610025627) 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, 305012810 + 305012811.

It is an arithmetic number, because the mean of its divisors is an integer number (305012811).

Almost surely, 2^610025621 is an apocalyptic number.

It is an amenable number.

610025621 is a deficient number, since it is larger than the sum of its proper divisors (1).

610025621 is an equidigital number, since it uses as much as digits as its factorization.

610025621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 610025621 is about 24698.6967469946. The cubic root of 610025621 is about 848.1044824425.

Adding to 610025621 its reverse (126520016), we get a palindrome (736545637).

The spelling of 610025621 in words is "six hundred ten million, twenty-five thousand, six hundred twenty-one".