99551839 has 2 divisors, whose sum is σ = 99551840. Its totient is φ = 99551838.

The previous prime is 99551807. The next prime is 99551857. The reversal of 99551839 is 93815599.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99551839 - 2⁵ = 99551807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99551792 and 99551801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99551899) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49775919 + 49775920.

It is an arithmetic number, because the mean of its divisors is an integer number (49775920).

Almost surely, 2^99551839 is an apocalyptic number.

99551839 is a deficient number, since it is larger than the sum of its proper divisors (1).

99551839 is an equidigital number, since it uses as much as digits as its factorization.

99551839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 437400, while the sum is 49.

The square root of 99551839 is about 9977.5667875490. The cubic root of 99551839 is about 463.4644519044.

The spelling of 99551839 in words is "ninety-nine million, five hundred fifty-one thousand, eight hundred thirty-nine".