99815395 has 4 divisors (see below), whose sum is σ = 119778480. Its totient is φ = 79852312.

The previous prime is 99815393. The next prime is 99815407. The reversal of 99815395 is 59351899.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59351899 = 3361 ⋅17659.

It is a cyclic number.

It is not a de Polignac number, because 99815395 - 2¹ = 99815393 is a prime.

It is a super-2 number, since 2×99815395² = 19926226158012050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (99815393) 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 3 ways as a sum of consecutive naturals, for example, 9981535 + ... + 9981544.

It is an arithmetic number, because the mean of its divisors is an integer number (29944620).

Almost surely, 2^99815395 is an apocalyptic number.

99815395 is a deficient number, since it is larger than the sum of its proper divisors (19963085).

99815395 is a wasteful number, since it uses less digits than its factorization.

99815395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19963084.

The product of its digits is 437400, while the sum is 49.

The square root of 99815395 is about 9990.7654861877. The cubic root of 99815395 is about 463.8730872556.

It can be divided in two parts, 9981 and 5395, that added together give a square (15376 = 124²).

The spelling of 99815395 in words is "ninety-nine million, eight hundred fifteen thousand, three hundred ninety-five".