9897596381 has 2 divisors, whose sum is σ = 9897596382. Its totient is φ = 9897596380.

The previous prime is 9897596377. The next prime is 9897596411. The reversal of 9897596381 is 1836957989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9794269156 + 103327225 = 98966^2 + 10165^2 .

It is an emirp because it is prime and its reverse (1836957989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9897596381 - 2² = 9897596377 is a prime.

It is a super-2 number, since 2×9897596381² (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 (9897596321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948798190 + 4948798191.

It is an arithmetic number, because the mean of its divisors is an integer number (4948798191).

Almost surely, 2^9897596381 is an apocalyptic number.

It is an amenable number.

9897596381 is a deficient number, since it is larger than the sum of its proper divisors (1).

9897596381 is an equidigital number, since it uses as much as digits as its factorization.

9897596381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29393280, while the sum is 65.

The square root of 9897596381 is about 99486.6643374880. The cubic root of 9897596381 is about 2147.0553798414.

The spelling of 9897596381 in words is "nine billion, eight hundred ninety-seven million, five hundred ninety-six thousand, three hundred eighty-one".