671522949 has 24 divisors (see below), whose sum is σ = 989108120. Its totient is φ = 438939648.

The previous prime is 671522941. The next prime is 671522963. The reversal of 671522949 is 949225176.

It can be written as a sum of positive squares in 4 ways, for example, as 378497025 + 293025924 = 19455^2 + 17118^2 .

It is not a de Polignac number, because 671522949 - 2³ = 671522941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671522941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91629 + ... + 98685.

Almost surely, 2^671522949 is an apocalyptic number.

It is an amenable number.

671522949 is a deficient number, since it is larger than the sum of its proper divisors (317585171).

671522949 is a wasteful number, since it uses less digits than its factorization.

671522949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7269 (or 7266 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 671522949 is about 25913.7598391279. The cubic root of 671522949 is about 875.6965116516.

The spelling of 671522949 in words is "six hundred seventy-one million, five hundred twenty-two thousand, nine hundred forty-nine".