99993641 has 4 divisors (see below), whose sum is σ = 109083984. Its totient is φ = 90903300.

The previous prime is 99993611. The next prime is 99993671. The reversal of 99993641 is 14639999.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14639999 = 11 ⋅1330909.

It is an interprime number because it is at equal distance from previous prime (99993611) and next prime (99993671).

It is a cyclic number.

It is not a de Polignac number, because 99993641 - 2¹⁰ = 99992617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99993641.

It is not an unprimeable number, because it can be changed into a prime (99993601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4545155 + ... + 4545176.

It is an arithmetic number, because the mean of its divisors is an integer number (27270996).

Almost surely, 2^99993641 is an apocalyptic number.

It is an amenable number.

99993641 is a deficient number, since it is larger than the sum of its proper divisors (9090343).

99993641 is a wasteful number, since it uses less digits than its factorization.

99993641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9090342.

The product of its digits is 472392, while the sum is 50.

The square root of 99993641 is about 9999.6820449452. The cubic root of 99993641 is about 464.1490445316.

The spelling of 99993641 in words is "ninety-nine million, nine hundred ninety-three thousand, six hundred forty-one".