9964232081 has 2 divisors, whose sum is σ = 9964232082. Its totient is φ = 9964232080.

The previous prime is 9964232029. The next prime is 9964232129. The reversal of 9964232081 is 1802324699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9397363600 + 566868481 = 96940^2 + 23809^2 .

It is a cyclic number.

It is not a de Polignac number, because 9964232081 - 2²² = 9960037777 is a prime.

It is a super-2 number, since 2×9964232081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9964232881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4982116040 + 4982116041.

It is an arithmetic number, because the mean of its divisors is an integer number (4982116041).

Almost surely, 2^9964232081 is an apocalyptic number.

It is an amenable number.

9964232081 is a deficient number, since it is larger than the sum of its proper divisors (1).

9964232081 is an equidigital number, since it uses as much as digits as its factorization.

9964232081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 9964232081 is about 99821.0002003586. Note that the first 3 decimals coincide. The cubic root of 9964232081 is about 2151.8629665677.

The spelling of 9964232081 in words is "nine billion, nine hundred sixty-four million, two hundred thirty-two thousand, eighty-one".