891929854 has 16 divisors (see below), whose sum is σ = 1418132448. Its totient is φ = 419276032.

The previous prime is 891929849. The next prime is 891929879. The reversal of 891929854 is 458929198.

It is a super-2 number, since 2×891929854² = 1591077728912922632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 891929795 and 891929804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18639 + ... + 46165.

It is an arithmetic number, because the mean of its divisors is an integer number (88633278).

Almost surely, 2^891929854 is an apocalyptic number.

891929854 is a deficient number, since it is larger than the sum of its proper divisors (526202594).

891929854 is a wasteful number, since it uses less digits than its factorization.

891929854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28499.

The product of its digits is 1866240, while the sum is 55.

The square root of 891929854 is about 29865.1946921496. The cubic root of 891929854 is about 962.5949232070.

The spelling of 891929854 in words is "eight hundred ninety-one million, nine hundred twenty-nine thousand, eight hundred fifty-four".