99615381 has 8 divisors (see below), whose sum is σ = 132955680. Its totient is φ = 66342672.

The previous prime is 99615367. The next prime is 99615407. The reversal of 99615381 is 18351699.

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

It is not a de Polignac number, because 99615381 - 2⁷ = 99615253 is a prime.

It is a super-2 number, since 2×99615381² = 19846448263550322, which contains 22 as substring.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99615301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13351 + ... + 19428.

It is an arithmetic number, because the mean of its divisors is an integer number (16619460).

Almost surely, 2^99615381 is an apocalyptic number.

It is an amenable number.

99615381 is a deficient number, since it is larger than the sum of its proper divisors (33340299).

99615381 is a wasteful number, since it uses less digits than its factorization.

99615381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33795.

The product of its digits is 58320, while the sum is 42.

The square root of 99615381 is about 9980.7505228815. The cubic root of 99615381 is about 463.5630377100.

The spelling of 99615381 in words is "ninety-nine million, six hundred fifteen thousand, three hundred eighty-one".