617227649 has 2 divisors, whose sum is σ = 617227650. Its totient is φ = 617227648.

The previous prime is 617227631. The next prime is 617227657. The reversal of 617227649 is 946722716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 565488400 + 51739249 = 23780^2 + 7193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-617227649 is a prime.

It is not a weakly prime, because it can be changed into another prime (617227669) 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, 308613824 + 308613825.

It is an arithmetic number, because the mean of its divisors is an integer number (308613825).

Almost surely, 2^617227649 is an apocalyptic number.

It is an amenable number.

617227649 is a deficient number, since it is larger than the sum of its proper divisors (1).

617227649 is an equidigital number, since it uses as much as digits as its factorization.

617227649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 44.

The square root of 617227649 is about 24844.0666759691. The cubic root of 617227649 is about 851.4290374184.

The spelling of 617227649 in words is "six hundred seventeen million, two hundred twenty-seven thousand, six hundred forty-nine".