99400051 has 2 divisors, whose sum is σ = 99400052. Its totient is φ = 99400050.

The previous prime is 99400033. The next prime is 99400079. The reversal of 99400051 is 15000499.

It is an a-pointer prime, because the next prime (99400079) can be obtained adding 99400051 to its sum of digits (28).

It is a weak prime.

It is an emirp because it is prime and its reverse (15000499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99400051 - 2¹¹ = 99398003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99399992 and 99400019.

It is not a weakly prime, because it can be changed into another prime (99400351) by changing a digit.

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 as a sum of consecutive naturals, namely, 49700025 + 49700026.

It is an arithmetic number, because the mean of its divisors is an integer number (49700026).

Almost surely, 2^99400051 is an apocalyptic number.

99400051 is a deficient number, since it is larger than the sum of its proper divisors (1).

99400051 is an equidigital number, since it uses as much as digits as its factorization.

99400051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 99400051 is about 9969.9574221759. The cubic root of 99400051 is about 463.2287819696.

The spelling of 99400051 in words is "ninety-nine million, four hundred thousand, fifty-one".