879820654 has 4 divisors (see below), whose sum is σ = 1319730984. Its totient is φ = 439910326.

The previous prime is 879820639. The next prime is 879820657. The reversal of 879820654 is 456028978.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 879820598 and 879820607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879820657) 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 as a sum of consecutive naturals, namely, 219955162 + ... + 219955165.

It is an arithmetic number, because the mean of its divisors is an integer number (329932746).

Almost surely, 2^879820654 is an apocalyptic number.

879820654 is a deficient number, since it is larger than the sum of its proper divisors (439910330).

879820654 is a wasteful number, since it uses less digits than its factorization.

879820654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439910329.

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 879820654 is about 29661.7709181364. The cubic root of 879820654 is about 958.2188668391.

The spelling of 879820654 in words is "eight hundred seventy-nine million, eight hundred twenty thousand, six hundred fifty-four".