7920243 has 6 divisors (see below), whose sum is σ = 11440364. Its totient is φ = 5280156.

The previous prime is 7920233. The next prime is 7920251. The reversal of 7920243 is 3420297.

7920243 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 7920243 - 2⁹ = 7919731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7920203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 440005 + ... + 440022.

Almost surely, 2^7920243 is an apocalyptic number.

7920243 is a deficient number, since it is larger than the sum of its proper divisors (3520121).

7920243 is a wasteful number, since it uses less digits than its factorization.

7920243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880033 (or 880030 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 7920243 is about 2814.2926287080. The cubic root of 7920243 is about 199.3331372752. Note that the first 3 decimals are identical.

The spelling of 7920243 in words is "seven million, nine hundred twenty thousand, two hundred forty-three".