99604681 has 4 divisors (see below), whose sum is σ = 108659664. Its totient is φ = 90549700.

The previous prime is 99604667. The next prime is 99604691. The reversal of 99604681 is 18640699.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99604681 - 2⁷ = 99604553 is a prime.

It is a super-2 number, since 2×99604681² = 19842184954223522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99604601) 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, 4527475 + ... + 4527496.

It is an arithmetic number, because the mean of its divisors is an integer number (27164916).

Almost surely, 2^99604681 is an apocalyptic number.

It is an amenable number.

99604681 is a deficient number, since it is larger than the sum of its proper divisors (9054983).

99604681 is a wasteful number, since it uses less digits than its factorization.

99604681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9054982.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 99604681 is about 9980.2144766533. The cubic root of 99604681 is about 463.5464395299.

It can be divided in two parts, 9960 and 4681, that added together give a palindrome (14641).

The spelling of 99604681 in words is "ninety-nine million, six hundred four thousand, six hundred eighty-one".