854208621 has 18 divisors (see below), whose sum is σ = 1435303662. Its totient is φ = 488118960.

The previous prime is 854208599. The next prime is 854208679. The reversal of 854208621 is 126802458.

854208621 is a `hidden beast` number, since 8 + 5 + 4 + 20 + 8 + 621 = 666.

854208621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 679175721 + 175032900 = 26061^2 + 13230^2 .

It is not a de Polignac number, because 854208621 - 2⁶ = 854208557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (854208521) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 968050 + ... + 968931.

Almost surely, 2^854208621 is an apocalyptic number.

It is an amenable number.

854208621 is a deficient number, since it is larger than the sum of its proper divisors (581095041).

854208621 is a wasteful number, since it uses less digits than its factorization.

854208621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937001 (or 1936991 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 854208621 is about 29226.8476062678. The cubic root of 854208621 is about 948.8290729661.

The spelling of 854208621 in words is "eight hundred fifty-four million, two hundred eight thousand, six hundred twenty-one".