9992381 has 4 divisors (see below), whose sum is σ = 11419872. Its totient is φ = 8564892.

The previous prime is 9992363. The next prime is 9992393. The reversal of 9992381 is 1832999.

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 9992381 - 2¹⁰ = 9991357 is a prime.

It is a super-2 number, since 2×9992381² = 199695356098322, 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 (9992321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713735 + ... + 713748.

It is an arithmetic number, because the mean of its divisors is an integer number (2854968).

Almost surely, 2^9992381 is an apocalyptic number.

It is an amenable number.

9992381 is a deficient number, since it is larger than the sum of its proper divisors (1427491).

9992381 is a wasteful number, since it uses less digits than its factorization.

9992381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427490.

The product of its digits is 34992, while the sum is 41.

The square root of 9992381 is about 3161.0727609468. The cubic root of 9992381 is about 215.3887396417.

The spelling of 9992381 in words is "nine million, nine hundred ninety-two thousand, three hundred eighty-one".