992371381 has 4 divisors (see below), whose sum is σ = 993077100. Its totient is φ = 991665664.

The previous prime is 992371361. The next prime is 992371403. The reversal of 992371381 is 183173299.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183173299 = 149 ⋅1229351.

It can be written as a sum of positive squares in 2 ways, for example, as 186322500 + 806048881 = 13650^2 + 28391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-992371381 is a prime.

It is a super-2 number, since 2×992371381² = 1969601915655694322, 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 (992371361) 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, 350746 + ... + 353563.

It is an arithmetic number, because the mean of its divisors is an integer number (248269275).

Almost surely, 2^992371381 is an apocalyptic number.

It is an amenable number.

992371381 is a deficient number, since it is larger than the sum of its proper divisors (705719).

992371381 is a wasteful number, since it uses less digits than its factorization.

992371381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705718.

The product of its digits is 81648, while the sum is 43.

The square root of 992371381 is about 31501.9266236210. The cubic root of 992371381 is about 997.4506332522.

The spelling of 992371381 in words is "nine hundred ninety-two million, three hundred seventy-one thousand, three hundred eighty-one".