617984417 has 2 divisors, whose sum is σ = 617984418. Its totient is φ = 617984416.

The previous prime is 617984407. The next prime is 617984429. The reversal of 617984417 is 714489716.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 453221521 + 164762896 = 21289^2 + 12836^2 .

It is a cyclic number.

It is not a de Polignac number, because 617984417 - 2¹⁰ = 617983393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (617984407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308992208 + 308992209.

It is an arithmetic number, because the mean of its divisors is an integer number (308992209).

Almost surely, 2^617984417 is an apocalyptic number.

It is an amenable number.

617984417 is a deficient number, since it is larger than the sum of its proper divisors (1).

617984417 is an equidigital number, since it uses as much as digits as its factorization.

617984417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 47.

The square root of 617984417 is about 24859.2923672417. The cubic root of 617984417 is about 851.7768675347.

The spelling of 617984417 in words is "six hundred seventeen million, nine hundred eighty-four thousand, four hundred seventeen".