99942407 has 2 divisors, whose sum is σ = 99942408.
Its totient is φ = 99942406.
The previous prime is 99942397. The next prime is 99942421. The reversal of 99942407 is 70424999.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 99942407 - 26 = 99942343 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (99942457) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49971203 + 49971204.
It is an arithmetic number, because the mean of its divisors is an integer number (49971204).
Almost surely, 299942407 is an apocalyptic number.
99942407 is a deficient number, since it is larger than the sum of its proper divisors (1).
99942407 is an equidigital number, since it uses as much as digits as its factorization.
99942407 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 163296, while the sum is 44.
The square root of 99942407 is about 9997.1199352614.
The cubic root of 99942407 is about 464.0697585740.
The spelling of 99942407 in words is "ninety-nine million, nine hundred forty-two thousand, four hundred seven".