99943613 has 16 divisors (see below), whose sum is σ = 125385216. Its totient is φ = 77390640.

The previous prime is 99943607. The next prime is 99943619. The reversal of 99943613 is 31634999.

It is an interprime number because it is at equal distance from previous prime (99943607) and next prime (99943619).

It is a cyclic number.

It is not a de Polignac number, because 99943613 - 2¹⁸ = 99681469 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99943619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8570 + ... + 16532.

It is an arithmetic number, because the mean of its divisors is an integer number (7836576).

Almost surely, 2^99943613 is an apocalyptic number.

It is an amenable number.

99943613 is a deficient number, since it is larger than the sum of its proper divisors (25441603).

99943613 is a wasteful number, since it uses less digits than its factorization.

99943613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8144.

The product of its digits is 157464, while the sum is 44.

The square root of 99943613 is about 9997.1802524512. The cubic root of 99943613 is about 464.0716252019.

The spelling of 99943613 in words is "ninety-nine million, nine hundred forty-three thousand, six hundred thirteen".