7982391 has 8 divisors (see below), whose sum is σ = 10890880. Its totient is φ = 5197752.

The previous prime is 7982329. The next prime is 7982423. The reversal of 7982391 is 1932897.

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

It is not a de Polignac number, because 7982391 - 2⁶ = 7982327 is a prime.

It is a d-powerful number, because it can be written as 7⁸ + 9⁵ + 8 + 2¹⁵ + 3¹³ + 9⁶ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7982791) 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, 30811 + ... + 31068.

It is an arithmetic number, because the mean of its divisors is an integer number (1361360).

Almost surely, 2^7982391 is an apocalyptic number.

7982391 is a deficient number, since it is larger than the sum of its proper divisors (2908489).

7982391 is a wasteful number, since it uses less digits than its factorization.

7982391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61925.

The product of its digits is 27216, while the sum is 39.

The square root of 7982391 is about 2825.3125490820. The cubic root of 7982391 is about 199.8531505359.

The spelling of 7982391 in words is "seven million, nine hundred eighty-two thousand, three hundred ninety-one".