7921433 has 8 divisors (see below), whose sum is σ = 8692488. Its totient is φ = 7173504.

The previous prime is 7921411. The next prime is 7921447. The reversal of 7921433 is 3341297.

It can be written as a sum of positive squares in 4 ways, for example, as 994009 + 6927424 = 997^2 + 2632^2 .

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

It is not a de Polignac number, because 7921433 - 2¹² = 7917337 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7921396 and 7921405.

It is not an unprimeable number, because it can be changed into a prime (7921493) 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, 5060 + ... + 6437.

It is an arithmetic number, because the mean of its divisors is an integer number (1086561).

Almost surely, 2^7921433 is an apocalyptic number.

It is an amenable number.

7921433 is a deficient number, since it is larger than the sum of its proper divisors (771055).

7921433 is a wasteful number, since it uses less digits than its factorization.

7921433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11563.

The product of its digits is 4536, while the sum is 29.

The square root of 7921433 is about 2814.5040415675. The cubic root of 7921433 is about 199.3431199047.

It can be divided in two parts, 79 and 21433, that added together give a palindrome (21512).

The spelling of 7921433 in words is "seven million, nine hundred twenty-one thousand, four hundred thirty-three".