820951459 has 16 divisors (see below), whose sum is σ = 860025600. Its totient is φ = 782667424.

The previous prime is 820951457. The next prime is 820951477. The reversal of 820951459 is 954159028.

It is a cyclic number.

It is not a de Polignac number, because 820951459 - 2¹ = 820951457 is a prime.

It is a super-2 number, since 2×820951459² = 1347922596068457362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820951457) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 866424 + ... + 867370.

It is an arithmetic number, because the mean of its divisors is an integer number (53751600).

Almost surely, 2^820951459 is an apocalyptic number.

820951459 is a deficient number, since it is larger than the sum of its proper divisors (39074141).

820951459 is a wasteful number, since it uses less digits than its factorization.

820951459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322.

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 820951459 is about 28652.2505049778. The cubic root of 820951459 is about 936.3520371286.

The spelling of 820951459 in words is "eight hundred twenty million, nine hundred fifty-one thousand, four hundred fifty-nine".