617681201 has 2 divisors, whose sum is σ = 617681202. Its totient is φ = 617681200.

The previous prime is 617681117. The next prime is 617681221. The reversal of 617681201 is 102186716.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 579846400 + 37834801 = 24080^2 + 6151^2 .

It is a cyclic number.

It is not a de Polignac number, because 617681201 - 2¹⁸ = 617419057 is a prime.

It is not a weakly prime, because it can be changed into another prime (617681221) 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, 308840600 + 308840601.

It is an arithmetic number, because the mean of its divisors is an integer number (308840601).

Almost surely, 2^617681201 is an apocalyptic number.

It is an amenable number.

617681201 is a deficient number, since it is larger than the sum of its proper divisors (1).

617681201 is an equidigital number, since it uses as much as digits as its factorization.

617681201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 617681201 is about 24853.1929739420. The cubic root of 617681201 is about 851.6375357437.

The spelling of 617681201 in words is "six hundred seventeen million, six hundred eighty-one thousand, two hundred one".