891963147 has 18 divisors (see below), whose sum is σ = 1220629116. Its totient is φ = 579364800.

The previous prime is 891963109. The next prime is 891963197. The reversal of 891963147 is 741369198.

It is a happy number.

It is not a de Polignac number, because 891963147 - 2⁸ = 891962891 is a prime.

It is a super-2 number, since 2×891963147² = 1591196511212287218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 891963096 and 891963105.

It is not an unprimeable number, because it can be changed into a prime (891963197) 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, 2224147 + ... + 2224547.

Almost surely, 2^891963147 is an apocalyptic number.

891963147 is a deficient number, since it is larger than the sum of its proper divisors (328665969).

891963147 is an frugal number, since it uses more digits than its factorization.

891963147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891 (or 447 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 891963147 is about 29865.7520749102. The cubic root of 891963147 is about 962.6068999612.

Multiplying 891963147 by its sum of digits (48), we get a square (42814231056 = 206916²).

The spelling of 891963147 in words is "eight hundred ninety-one million, nine hundred sixty-three thousand, one hundred forty-seven".