821473348 has 6 divisors (see below), whose sum is σ = 1437578366. Its totient is φ = 410736672.

The previous prime is 821473291. The next prime is 821473361. The reversal of 821473348 is 843374128.

It can be written as a sum of positive squares in only one way, i.e., 436057924 + 385415424 = 20882^2 + 19632^2 .

It is a super-2 number, since 2×821473348² = 1349636922948658208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 821473348.

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 as a sum of consecutive naturals, namely, 102684165 + ... + 102684172.

Almost surely, 2^821473348 is an apocalyptic number.

It is an amenable number.

821473348 is a deficient number, since it is larger than the sum of its proper divisors (616105018).

821473348 is a wasteful number, since it uses less digits than its factorization.

821473348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205368341 (or 205368339 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 821473348 is about 28661.3563531107. The cubic root of 821473348 is about 936.5504119565.

The spelling of 821473348 in words is "eight hundred twenty-one million, four hundred seventy-three thousand, three hundred forty-eight".