99537381 has 12 divisors (see below), whose sum is σ = 147283500. Its totient is φ = 64739520.

The previous prime is 99537377. The next prime is 99537439. The reversal of 99537381 is 18373599.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3006756 + 96530625 = 1734^2 + 9825^2 .

It is not a de Polignac number, because 99537381 - 2² = 99537377 is a prime.

It is a super-2 number, since 2×99537381² = 19815380432678322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99537301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134506 + ... + 135243.

It is an arithmetic number, because the mean of its divisors is an integer number (12273625).

Almost surely, 2^99537381 is an apocalyptic number.

It is an amenable number.

99537381 is a deficient number, since it is larger than the sum of its proper divisors (47746119).

99537381 is a wasteful number, since it uses less digits than its factorization.

99537381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269796 (or 269793 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 99537381 is about 9976.8422358981. The cubic root of 99537381 is about 463.4420143699.

The spelling of 99537381 in words is "ninety-nine million, five hundred thirty-seven thousand, three hundred eighty-one".