81848353 has 8 divisors (see below), whose sum is σ = 89651880. Its totient is φ = 74376960.

The previous prime is 81848317. The next prime is 81848357. The reversal of 81848353 is 35384818.

It can be written as a sum of positive squares in 4 ways, for example, as 8025889 + 73822464 = 2833^2 + 8592^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81848353 is a prime.

It is a super-3 number, since 3×81848353³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (81848357) 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, 82518 + ... + 83503.

It is an arithmetic number, because the mean of its divisors is an integer number (11206485).

Almost surely, 2^81848353 is an apocalyptic number.

It is an amenable number.

81848353 is a deficient number, since it is larger than the sum of its proper divisors (7803527).

81848353 is a wasteful number, since it uses less digits than its factorization.

81848353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166067.

The product of its digits is 92160, while the sum is 40.

The square root of 81848353 is about 9047.0079584358. The cubic root of 81848353 is about 434.1801672205.

The spelling of 81848353 in words is "eighty-one million, eight hundred forty-eight thousand, three hundred fifty-three".