99551807 has 2 divisors, whose sum is σ = 99551808. Its totient is φ = 99551806.

The previous prime is 99551743. The next prime is 99551839. The reversal of 99551807 is 70815599.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99551807 - 2⁶ = 99551743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99551857) 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, 49775903 + 49775904.

It is an arithmetic number, because the mean of its divisors is an integer number (49775904).

Almost surely, 2^99551807 is an apocalyptic number.

99551807 is a deficient number, since it is larger than the sum of its proper divisors (1).

99551807 is an equidigital number, since it uses as much as digits as its factorization.

99551807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 99551807 is about 9977.5651839514. The cubic root of 99551807 is about 463.4644022456.

The spelling of 99551807 in words is "ninety-nine million, five hundred fifty-one thousand, eight hundred seven".