9963962381 has 2 divisors, whose sum is σ = 9963962382. Its totient is φ = 9963962380.

The previous prime is 9963962369. The next prime is 9963962413. The reversal of 9963962381 is 1832693699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9103068100 + 860894281 = 95410^2 + 29341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9963962381 is a prime.

It is a super-2 number, since 2×9963962381² (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 (9963962321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4981981190 + 4981981191.

It is an arithmetic number, because the mean of its divisors is an integer number (4981981191).

Almost surely, 2^9963962381 is an apocalyptic number.

It is an amenable number.

9963962381 is a deficient number, since it is larger than the sum of its proper divisors (1).

9963962381 is an equidigital number, since it uses as much as digits as its factorization.

9963962381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 56.

The square root of 9963962381 is about 99819.6492730765. The cubic root of 9963962381 is about 2151.8435517022.

The spelling of 9963962381 in words is "nine billion, nine hundred sixty-three million, nine hundred sixty-two thousand, three hundred eighty-one".