7842021233 has 2 divisors, whose sum is σ = 7842021234. Its totient is φ = 7842021232.

The previous prime is 7842021199. The next prime is 7842021289. The reversal of 7842021233 is 3321202487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5768858209 + 2073163024 = 75953^2 + 45532^2 .

It is an emirp because it is prime and its reverse (3321202487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7842021233 - 2¹⁶ = 7841955697 is a prime.

It is a super-2 number, since 2×7842021233² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7842021233.

It is not a weakly prime, because it can be changed into another prime (7842024233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3921010616 + 3921010617.

It is an arithmetic number, because the mean of its divisors is an integer number (3921010617).

Almost surely, 2^7842021233 is an apocalyptic number.

It is an amenable number.

7842021233 is a deficient number, since it is larger than the sum of its proper divisors (1).

7842021233 is an equidigital number, since it uses as much as digits as its factorization.

7842021233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 7842021233 is about 88555.1874990957. The cubic root of 7842021233 is about 1986.7474820954.

The spelling of 7842021233 in words is "seven billion, eight hundred forty-two million, twenty-one thousand, two hundred thirty-three".