821955962 has 16 divisors (see below), whose sum is σ = 1267664040. Its totient is φ = 399426048.

The previous prime is 821955949. The next prime is 821955973. The reversal of 821955962 is 269559128.

It can be written as a sum of positive squares in 4 ways, for example, as 806503201 + 15452761 = 28399^2 + 3931^2 .

It is a super-2 number, since 2×821955962² = 1351223206934690888, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66614 + ... + 77982.

Almost surely, 2^821955962 is an apocalyptic number.

821955962 is a deficient number, since it is larger than the sum of its proper divisors (445708078).

821955962 is a wasteful number, since it uses less digits than its factorization.

821955962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12385.

The product of its digits is 388800, while the sum is 47.

The square root of 821955962 is about 28669.7743625582. The cubic root of 821955962 is about 936.7337832351.

The spelling of 821955962 in words is "eight hundred twenty-one million, nine hundred fifty-five thousand, nine hundred sixty-two".