9712885381 has 4 divisors (see below), whose sum is σ = 9713083500. Its totient is φ = 9712687264.

The previous prime is 9712885361. The next prime is 9712885387. The reversal of 9712885381 is 1835882179.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1835882179 = 37361 ⋅49139.

It can be written as a sum of positive squares in 2 ways, for example, as 438232356 + 9274653025 = 20934^2 + 96305^2 .

It is a cyclic number.

It is not a de Polignac number, because 9712885381 - 2⁹ = 9712884869 is a prime.

It is a super-2 number, since 2×9712885381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9712885387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34545 + ... + 143593.

It is an arithmetic number, because the mean of its divisors is an integer number (2428270875).

Almost surely, 2^9712885381 is an apocalyptic number.

It is an amenable number.

9712885381 is a deficient number, since it is larger than the sum of its proper divisors (198119).

9712885381 is a wasteful number, since it uses less digits than its factorization.

9712885381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198118.

The product of its digits is 967680, while the sum is 52.

The square root of 9712885381 is about 98553.9719189440. The cubic root of 9712885381 is about 2133.6151572315.

The spelling of 9712885381 in words is "nine billion, seven hundred twelve million, eight hundred eighty-five thousand, three hundred eighty-one".