616421587 has 2 divisors, whose sum is σ = 616421588. Its totient is φ = 616421586.

The previous prime is 616421573. The next prime is 616421609. The reversal of 616421587 is 785124616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 616421587 - 2¹⁵ = 616388819 is a prime.

It is not a weakly prime, because it can be changed into another prime (616421527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308210793 + 308210794.

It is an arithmetic number, because the mean of its divisors is an integer number (308210794).

Almost surely, 2^616421587 is an apocalyptic number.

616421587 is a deficient number, since it is larger than the sum of its proper divisors (1).

616421587 is an equidigital number, since it uses as much as digits as its factorization.

616421587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 616421587 is about 24827.8389514674. The cubic root of 616421587 is about 851.0582376720.

The spelling of 616421587 in words is "six hundred sixteen million, four hundred twenty-one thousand, five hundred eighty-seven".