820898493 has 8 divisors (see below), whose sum is σ = 1095064128. Its totient is φ = 546999264.

The previous prime is 820898479. The next prime is 820898501. The reversal of 820898493 is 394898028.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 820898493 - 2⁹ = 820897981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820898993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59296 + ... + 71817.

It is an arithmetic number, because the mean of its divisors is an integer number (136883016).

Almost surely, 2^820898493 is an apocalyptic number.

It is an amenable number.

820898493 is a deficient number, since it is larger than the sum of its proper divisors (274165635).

820898493 is a wasteful number, since it uses less digits than its factorization.

820898493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133203.

The product of its (nonzero) digits is 995328, while the sum is 51.

The square root of 820898493 is about 28651.3261996718. The cubic root of 820898493 is about 936.3318995642.

The spelling of 820898493 in words is "eight hundred twenty million, eight hundred ninety-eight thousand, four hundred ninety-three".