99456509 has 2 divisors, whose sum is σ = 99456510. Its totient is φ = 99456508.

The previous prime is 99456503. The next prime is 99456541. The reversal of 99456509 is 90565499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81631225 + 17825284 = 9035^2 + 4222^2 .

It is a cyclic number.

It is not a de Polignac number, because 99456509 - 2¹² = 99452413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99456503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49728254 + 49728255.

It is an arithmetic number, because the mean of its divisors is an integer number (49728255).

Almost surely, 2^99456509 is an apocalyptic number.

It is an amenable number.

99456509 is a deficient number, since it is larger than the sum of its proper divisors (1).

99456509 is an equidigital number, since it uses as much as digits as its factorization.

99456509 is an odious number, because the sum of its binary digits is odd.

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

The square root of 99456509 is about 9972.7884265134. The cubic root of 99456509 is about 463.3164681104.

The spelling of 99456509 in words is "ninety-nine million, four hundred fifty-six thousand, five hundred nine".