162863981 has 16 divisors (see below), whose sum is σ = 188418048. Its totient is φ = 137894400.

The previous prime is 162863969. The next prime is 162863983. The reversal of 162863981 is 189368261.

It is not a de Polignac number, because 162863981 - 2⁶ = 162863917 is a prime.

It is a super-2 number, since 2×162863981² = 53049352614336722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162863983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241661 + ... + 242333.

It is an arithmetic number, because the mean of its divisors is an integer number (11776128).

Almost surely, 2^162863981 is an apocalyptic number.

It is an amenable number.

162863981 is a deficient number, since it is larger than the sum of its proper divisors (25554067).

162863981 is a wasteful number, since it uses less digits than its factorization.

162863981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052.

The product of its digits is 124416, while the sum is 44.

The square root of 162863981 is about 12761.8173078915. The cubic root of 162863981 is about 546.1035697833.

The spelling of 162863981 in words is "one hundred sixty-two million, eight hundred sixty-three thousand, nine hundred eighty-one".