9720146869 has 2 divisors, whose sum is σ = 9720146870. Its totient is φ = 9720146868.

The previous prime is 9720146819. The next prime is 9720146879. The reversal of 9720146869 is 9686410279.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5312514769 + 4407632100 = 72887^2 + 66390^2 .

It is a cyclic number.

It is not a de Polignac number, because 9720146869 - 2⁷ = 9720146741 is a prime.

It is a super-2 number, since 2×9720146869² (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 (9720146819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4860073434 + 4860073435.

It is an arithmetic number, because the mean of its divisors is an integer number (4860073435).

Almost surely, 2^9720146869 is an apocalyptic number.

It is an amenable number.

9720146869 is a deficient number, since it is larger than the sum of its proper divisors (1).

9720146869 is an equidigital number, since it uses as much as digits as its factorization.

9720146869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 9720146869 is about 98590.8051950079. The cubic root of 9720146869 is about 2134.1467315568.

The spelling of 9720146869 in words is "nine billion, seven hundred twenty million, one hundred forty-six thousand, eight hundred sixty-nine".