819671425 has 12 divisors (see below), whose sum is σ = 1026263680. Its totient is φ = 649368720.

The previous prime is 819671393. The next prime is 819671441. The reversal of 819671425 is 524176918.

It is not a de Polignac number, because 819671425 - 2⁵ = 819671393 is a prime.

It is a super-2 number, since 2×819671425² = 1343722489923061250, which contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 156585 + ... + 161734.

Almost surely, 2^819671425 is an apocalyptic number.

It is an amenable number.

819671425 is a deficient number, since it is larger than the sum of its proper divisors (206592255).

819671425 is a wasteful number, since it uses less digits than its factorization.

819671425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318432 (or 318427 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 819671425 is about 28629.9043833541. The cubic root of 819671425 is about 935.8651281457.

The spelling of 819671425 in words is "eight hundred nineteen million, six hundred seventy-one thousand, four hundred twenty-five".