8442972469 has 2 divisors, whose sum is σ = 8442972470. Its totient is φ = 8442972468.

The previous prime is 8442972427. The next prime is 8442972493. The reversal of 8442972469 is 9642792448.

It is a happy number.

8442972469 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8363102500 + 79869969 = 91450^2 + 8937^2 .

It is a cyclic number.

It is not a de Polignac number, because 8442972469 - 2¹¹ = 8442970421 is a prime.

It is a super-2 number, since 2×8442972469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8442972409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4221486234 + 4221486235.

It is an arithmetic number, because the mean of its divisors is an integer number (4221486235).

Almost surely, 2^8442972469 is an apocalyptic number.

It is an amenable number.

8442972469 is a deficient number, since it is larger than the sum of its proper divisors (1).

8442972469 is an equidigital number, since it uses as much as digits as its factorization.

8442972469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 55.

The square root of 8442972469 is about 91885.6488740217. The cubic root of 8442972469 is about 2036.2532526214.

The spelling of 8442972469 in words is "eight billion, four hundred forty-two million, nine hundred seventy-two thousand, four hundred sixty-nine".