99956405 has 16 divisors (see below), whose sum is σ = 121465344. Its totient is φ = 78960960.

The previous prime is 99956387. The next prime is 99956471. The reversal of 99956405 is 50465999.

It is not a de Polignac number, because 99956405 - 2⁶ = 99956341 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 99956405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174770 + ... + 175340.

It is an arithmetic number, because the mean of its divisors is an integer number (7591584).

Almost surely, 2^99956405 is an apocalyptic number.

It is an amenable number.

99956405 is a deficient number, since it is larger than the sum of its proper divisors (21508939).

99956405 is a wasteful number, since it uses less digits than its factorization.

99956405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956.

The product of its (nonzero) digits is 437400, while the sum is 47.

The square root of 99956405 is about 9997.8200123827. The cubic root of 99956405 is about 464.0914235356.

The spelling of 99956405 in words is "ninety-nine million, nine hundred fifty-six thousand, four hundred five".