617492849 has 2 divisors, whose sum is σ = 617492850. Its totient is φ = 617492848.

The previous prime is 617492809. The next prime is 617492929. The reversal of 617492849 is 948294716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 606390625 + 11102224 = 24625^2 + 3332^2 .

It is a cyclic number.

It is not a de Polignac number, because 617492849 - 2²⁰ = 616444273 is a prime.

It is a super-2 number, since 2×617492849² = 762594837132273602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 617492797 and 617492806.

It is not a weakly prime, because it can be changed into another prime (617492809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308746424 + 308746425.

It is an arithmetic number, because the mean of its divisors is an integer number (308746425).

Almost surely, 2^617492849 is an apocalyptic number.

It is an amenable number.

617492849 is a deficient number, since it is larger than the sum of its proper divisors (1).

617492849 is an equidigital number, since it uses as much as digits as its factorization.

617492849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The square root of 617492849 is about 24849.4033932407. The cubic root of 617492849 is about 851.5509625297.

The spelling of 617492849 in words is "six hundred seventeen million, four hundred ninety-two thousand, eight hundred forty-nine".