99609943 has 2 divisors, whose sum is σ = 99609944. Its totient is φ = 99609942.

The previous prime is 99609929. The next prime is 99610001. The reversal of 99609943 is 34990699.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99609943 - 2⁹ = 99609431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99609043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49804971 + 49804972.

It is an arithmetic number, because the mean of its divisors is an integer number (49804972).

Almost surely, 2^99609943 is an apocalyptic number.

99609943 is a deficient number, since it is larger than the sum of its proper divisors (1).

99609943 is an equidigital number, since it uses as much as digits as its factorization.

99609943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 49.

The square root of 99609943 is about 9980.4780947608. The cubic root of 99609943 is about 463.5546022601.

The spelling of 99609943 in words is "ninety-nine million, six hundred nine thousand, nine hundred forty-three".