556617001 has 2 divisors, whose sum is σ = 556617002. Its totient is φ = 556617000.

The previous prime is 556616993. The next prime is 556617023. The reversal of 556617001 is 100716655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 447957225 + 108659776 = 21165^2 + 10424^2 .

It is a cyclic number.

It is not a de Polignac number, because 556617001 - 2³ = 556616993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (556617041) 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, 278308500 + 278308501.

It is an arithmetic number, because the mean of its divisors is an integer number (278308501).

Almost surely, 2^556617001 is an apocalyptic number.

It is an amenable number.

556617001 is a deficient number, since it is larger than the sum of its proper divisors (1).

556617001 is an equidigital number, since it uses as much as digits as its factorization.

556617001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 556617001 is about 23592.7319528706. The cubic root of 556617001 is about 822.5939082794.

The spelling of 556617001 in words is "five hundred fifty-six million, six hundred seventeen thousand, one".