820693895 has 12 divisors (see below), whose sum is σ = 1145622024. Its totient is φ = 562761360.

The previous prime is 820693871. The next prime is 820693897. The reversal of 820693895 is 598396028.

It is not a de Polignac number, because 820693895 - 2¹⁴ = 820677511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820693897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1674641 + ... + 1675130.

It is an arithmetic number, because the mean of its divisors is an integer number (95468502).

Almost surely, 2^820693895 is an apocalyptic number.

820693895 is a deficient number, since it is larger than the sum of its proper divisors (324928129).

820693895 is a wasteful number, since it uses less digits than its factorization.

820693895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3349790 (or 3349783 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 820693895 is about 28647.7554967226. The cubic root of 820693895 is about 936.2541036883.

The spelling of 820693895 in words is "eight hundred twenty million, six hundred ninety-three thousand, eight hundred ninety-five".