7921983 has 8 divisors (see below), whose sum is σ = 11184048. Its totient is φ = 4970624.

The previous prime is 7921981. The next prime is 7921987. The reversal of 7921983 is 3891297.

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

It is a cyclic number.

It is not a de Polignac number, because 7921983 - 2¹ = 7921981 is a prime.

It is a d-powerful number, because it can be written as 7⁸ + 9³ + 2²¹ + 1 + 9⁵ + 8 + 3⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921981) 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, 77616 + ... + 77717.

It is an arithmetic number, because the mean of its divisors is an integer number (1398006).

Almost surely, 2^7921983 is an apocalyptic number.

7921983 is a deficient number, since it is larger than the sum of its proper divisors (3262065).

7921983 is a wasteful number, since it uses less digits than its factorization.

7921983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155353.

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

The square root of 7921983 is about 2814.6017480276. The cubic root of 7921983 is about 199.3477333872.

It can be divided in two parts, 792 and 1983, that added together give a triangular number (2775 = T₇₄).

The spelling of 7921983 in words is "seven million, nine hundred twenty-one thousand, nine hundred eighty-three".