992630381 has 4 divisors (see below), whose sum is σ = 996018492. Its totient is φ = 989242272.

The previous prime is 992630347. The next prime is 992630407. The reversal of 992630381 is 183036299.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183036299 = 37 ⋅4946927.

It can be written as a sum of positive squares in 2 ways, for example, as 382984900 + 609645481 = 19570^2 + 24691^2 .

It is a cyclic number.

It is not a de Polignac number, because 992630381 - 2¹⁰ = 992629357 is a prime.

It is a super-2 number, since 2×992630381² = 1970630146568410322, 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 (992630981) 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, 1693616 + ... + 1694201.

It is an arithmetic number, because the mean of its divisors is an integer number (249004623).

Almost surely, 2^992630381 is an apocalyptic number.

It is an amenable number.

992630381 is a deficient number, since it is larger than the sum of its proper divisors (3388111).

992630381 is a wasteful number, since it uses less digits than its factorization.

992630381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3388110.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 992630381 is about 31506.0372151116. The cubic root of 992630381 is about 997.5374009171.

The spelling of 992630381 in words is "nine hundred ninety-two million, six hundred thirty thousand, three hundred eighty-one".