617390649 has 24 divisors (see below), whose sum is σ = 945689472. Its totient is φ = 386789760.

The previous prime is 617390647. The next prime is 617390651. The reversal of 617390649 is 946093716.

It is an interprime number because it is at equal distance from previous prime (617390647) and next prime (617390651).

It is not a de Polignac number, because 617390649 - 2¹ = 617390647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (617390647) 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 in 23 ways as a sum of consecutive naturals, for example, 110964 + ... + 116394.

It is an arithmetic number, because the mean of its divisors is an integer number (39403728).

Almost surely, 2^617390649 is an apocalyptic number.

It is an amenable number.

617390649 is a deficient number, since it is larger than the sum of its proper divisors (328298823).

617390649 is a wasteful number, since it uses less digits than its factorization.

617390649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6197 (or 6194 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 617390649 is about 24847.3469207479. The cubic root of 617390649 is about 851.5039804417.

The spelling of 617390649 in words is "six hundred seventeen million, three hundred ninety thousand, six hundred forty-nine".