99727381 has 16 divisors (see below), whose sum is σ = 110073600. Its totient is φ = 89792640.

The previous prime is 99727361. The next prime is 99727387. The reversal of 99727381 is 18372799.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 99727381 - 2¹¹ = 99725333 is a prime.

It is a super-2 number, since 2×99727381² = 19891101042238322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99727387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94545 + ... + 95593.

It is an arithmetic number, because the mean of its divisors is an integer number (6879600).

Almost surely, 2^99727381 is an apocalyptic number.

It is an amenable number.

99727381 is a deficient number, since it is larger than the sum of its proper divisors (10346219).

99727381 is a wasteful number, since it uses less digits than its factorization.

99727381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its digits is 190512, while the sum is 46.

The square root of 99727381 is about 9986.3597471751. The cubic root of 99727381 is about 463.7367043798.

The spelling of 99727381 in words is "ninety-nine million, seven hundred twenty-seven thousand, three hundred eighty-one".