9891893764 has 15 divisors (see below), whose sum is σ = 17388790727. Its totient is φ = 4923767748.

The previous prime is 9891893761. The next prime is 9891893777. The reversal of 9891893764 is 4673981989.

The square root of 9891893764 is 99458.

It is a perfect power (a square), and thus also a powerful number.

It is an ABA number since it can be written as A⋅B^A, here for A=4, B=223.

It is a Duffinian number.

Its product of digits (23514624) is a multiple of the sum of its prime factors (896).

It is a junction number, because it is equal to n+sod(n) for n = 9891893696 and 9891893705.

It is not an unprimeable number, because it can be changed into a prime (9891893761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 4 ways as a sum of consecutive naturals, for example, 44358157 + ... + 44358379.

Almost surely, 2^9891893764 is an apocalyptic number.

9891893764 is the 99458-th square number.

It is an amenable number.

9891893764 is a deficient number, since it is larger than the sum of its proper divisors (7496896963).

9891893764 is an frugal number, since it uses more digits than its factorization.

9891893764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896 (or 225 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 64.

The cubic root of 9891893764 is about 2146.6429501879.

Multiplying 9891893764 by its sum of digits (64), we get a 4-th power (633081200896 = 892⁴).

The spelling of 9891893764 in words is "nine billion, eight hundred ninety-one million, eight hundred ninety-three thousand, seven hundred sixty-four".