893163981 has 4 divisors (see below), whose sum is σ = 1190885312. Its totient is φ = 595442652.

The previous prime is 893163977. The next prime is 893164001. The reversal of 893163981 is 189361398.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 893163981 - 2² = 893163977 is a prime.

It is a super-2 number, since 2×893163981² = 1595483793911536722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 893163981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (893162981) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 148860661 + ... + 148860666.

It is an arithmetic number, because the mean of its divisors is an integer number (297721328).

Almost surely, 2^893163981 is an apocalyptic number.

It is an amenable number.

893163981 is a deficient number, since it is larger than the sum of its proper divisors (297721331).

893163981 is a wasteful number, since it uses less digits than its factorization.

893163981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297721330.

The product of its digits is 279936, while the sum is 48.

The square root of 893163981 is about 29885.8491764915. The cubic root of 893163981 is about 963.0386863899.

The spelling of 893163981 in words is "eight hundred ninety-three million, one hundred sixty-three thousand, nine hundred eighty-one".