820614641 has 8 divisors (see below), whose sum is σ = 1023104064. Its totient is φ = 639439920.

The previous prime is 820614629. The next prime is 820614647. The reversal of 820614641 is 146416028.

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

It is not a de Polignac number, because 820614641 - 2²² = 816420337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 820614598 and 820614607.

It is not an unprimeable number, because it can be changed into a prime (820614647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5328590 + ... + 5328743.

It is an arithmetic number, because the mean of its divisors is an integer number (127888008).

Almost surely, 2^820614641 is an apocalyptic number.

It is an amenable number.

820614641 is a deficient number, since it is larger than the sum of its proper divisors (202489423).

820614641 is a wasteful number, since it uses less digits than its factorization.

820614641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10657351.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 820614641 is about 28646.3722135980. The cubic root of 820614641 is about 936.2239648542.

The spelling of 820614641 in words is "eight hundred twenty million, six hundred fourteen thousand, six hundred forty-one".