7821093854 has 8 divisors (see below), whose sum is σ = 13407589488. Its totient is φ = 3351897360.

The previous prime is 7821093853. The next prime is 7821093859. The reversal of 7821093854 is 4583901287.

It is a happy number.

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

It is a super-2 number, since 2×7821093854² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7821093799 and 7821093808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7821093853) 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 3 ways as a sum of consecutive naturals, for example, 279324767 + ... + 279324794.

It is an arithmetic number, because the mean of its divisors is an integer number (1675948686).

Almost surely, 2^7821093854 is an apocalyptic number.

7821093854 is a deficient number, since it is larger than the sum of its proper divisors (5586495634).

7821093854 is a wasteful number, since it uses less digits than its factorization.

7821093854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558649570.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 7821093854 is about 88436.9484661247. The cubic root of 7821093854 is about 1984.9786159654.

The spelling of 7821093854 in words is "seven billion, eight hundred twenty-one million, ninety-three thousand, eight hundred fifty-four".