9981357 has 8 divisors (see below), whose sum is σ = 13365120. Its totient is φ = 6625920.

The previous prime is 9981341. The next prime is 9981359. The reversal of 9981357 is 7531899.

It is a happy number.

9981357 is nontrivially palindromic in base 14.

9981357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9981357 - 2⁴ = 9981341 is a prime.

It is a super-2 number, since 2×9981357² = 199254975122898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9981359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6244 + ... + 7677.

It is an arithmetic number, because the mean of its divisors is an integer number (1670640).

Almost surely, 2^9981357 is an apocalyptic number.

It is an amenable number.

9981357 is a deficient number, since it is larger than the sum of its proper divisors (3383763).

9981357 is a wasteful number, since it uses less digits than its factorization.

9981357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14163.

The product of its digits is 68040, while the sum is 42.

The square root of 9981357 is about 3159.3285679081. The cubic root of 9981357 is about 215.3095019640.

The spelling of 9981357 in words is "nine million, nine hundred eighty-one thousand, three hundred fifty-seven".