671098849 has 2 divisors, whose sum is σ = 671098850. Its totient is φ = 671098848.

The previous prime is 671098823. The next prime is 671098877. The reversal of 671098849 is 948890176.

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., 648058849 + 23040000 = 25457^2 + 4800^2 .

It is a cyclic number.

It is not a de Polignac number, because 671098849 - 2²⁵ = 637544417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 671098796 and 671098805.

It is not a weakly prime, because it can be changed into another prime (671096849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335549424 + 335549425.

It is an arithmetic number, because the mean of its divisors is an integer number (335549425).

Almost surely, 2^671098849 is an apocalyptic number.

It is an amenable number.

671098849 is a deficient number, since it is larger than the sum of its proper divisors (1).

671098849 is an equidigital number, since it uses as much as digits as its factorization.

671098849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 671098849 is about 25905.5756353724. The cubic root of 671098849 is about 875.5121242574.

The spelling of 671098849 in words is "six hundred seventy-one million, ninety-eight thousand, eight hundred forty-nine".