99993649 has 4 divisors (see below), whose sum is σ = 114278464. Its totient is φ = 85708836.

The previous prime is 99993611. The next prime is 99993671. The reversal of 99993649 is 94639999.

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: 94639999 = 47 ⋅2013617.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99993649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99993593 and 99993602.

It is not an unprimeable number, because it can be changed into a prime (99993679) 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, 7142397 + ... + 7142410.

It is an arithmetic number, because the mean of its divisors is an integer number (28569616).

Almost surely, 2^99993649 is an apocalyptic number.

It is an amenable number.

99993649 is a deficient number, since it is larger than the sum of its proper divisors (14284815).

99993649 is a wasteful number, since it uses less digits than its factorization.

99993649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14284814.

The product of its digits is 4251528, while the sum is 58.

The square root of 99993649 is about 9999.6824449579. The cubic root of 99993649 is about 464.1490569097.

The spelling of 99993649 in words is "ninety-nine million, nine hundred ninety-three thousand, six hundred forty-nine".