992981 has 4 divisors (see below), whose sum is σ = 1083264. Its totient is φ = 902700.

The previous prime is 992963. The next prime is 992983. The reversal of 992981 is 189299.

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, and also an emirpimes, since its reverse is a distinct semiprime: 189299 = 11 ⋅17209.

It is a cyclic number.

It is not a de Polignac number, because 992981 - 2⁶ = 992917 is a prime.

It is a super-2 number, since 2×992981² = 1972022532722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (992983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45125 + ... + 45146.

It is an arithmetic number, because the mean of its divisors is an integer number (270816).

2⁹⁹²⁹⁸¹ is an apocalyptic number.

It is an amenable number.

992981 is a deficient number, since it is larger than the sum of its proper divisors (90283).

992981 is a wasteful number, since it uses less digits than its factorization.

992981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90282.

The product of its digits is 11664, while the sum is 38.

The square root of 992981 is about 996.4843199971. The cubic root of 992981 is about 99.7654837847.

It can be divided in two parts, 99298 and 1, that added together give a palindrome (99299).

The spelling of 992981 in words is "nine hundred ninety-two thousand, nine hundred eighty-one".