9992391 has 8 divisors (see below), whose sum is σ = 13342704. Its totient is φ = 6651840.

The previous prime is 9992363. The next prime is 9992393. The reversal of 9992391 is 1932999.

It is a happy number.

9992391 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9992391 - 2⁷ = 9992263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9992393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435 + ... + 4491.

It is an arithmetic number, because the mean of its divisors is an integer number (1667838).

Almost surely, 2^9992391 is an apocalyptic number.

9992391 is a deficient number, since it is larger than the sum of its proper divisors (3350313).

9992391 is a wasteful number, since it uses less digits than its factorization.

9992391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4881.

The product of its digits is 39366, while the sum is 42.

The square root of 9992391 is about 3161.0743426879. The cubic root of 9992391 is about 215.3888114927.

The spelling of 9992391 in words is "nine million, nine hundred ninety-two thousand, three hundred ninety-one".