9921392653 has 2 divisors, whose sum is σ = 9921392654. Its totient is φ = 9921392652.

The previous prime is 9921392597. The next prime is 9921392683. The reversal of 9921392653 is 3562931299.

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., 9475464964 + 445927689 = 97342^2 + 21117^2 .

It is an emirp because it is prime and its reverse (3562931299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9921392653 - 2¹³ = 9921384461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9921392597 and 9921392606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9921392683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4960696326 + 4960696327.

It is an arithmetic number, because the mean of its divisors is an integer number (4960696327).

Almost surely, 2^9921392653 is an apocalyptic number.

It is an amenable number.

9921392653 is a deficient number, since it is larger than the sum of its proper divisors (1).

9921392653 is an equidigital number, since it uses as much as digits as its factorization.

9921392653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 49.

The square root of 9921392653 is about 99606.1878248535. The cubic root of 9921392653 is about 2148.7746869198.

The spelling of 9921392653 in words is "nine billion, nine hundred twenty-one million, three hundred ninety-two thousand, six hundred fifty-three".