84099551 has 2 divisors, whose sum is σ = 84099552. Its totient is φ = 84099550.

The previous prime is 84099517. The next prime is 84099581. The reversal of 84099551 is 15599048.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84099551 - 2¹⁰ = 84098527 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 84099499 and 84099508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84099581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42049775 + 42049776.

It is an arithmetic number, because the mean of its divisors is an integer number (42049776).

Almost surely, 2^84099551 is an apocalyptic number.

84099551 is a deficient number, since it is larger than the sum of its proper divisors (1).

84099551 is an equidigital number, since it uses as much as digits as its factorization.

84099551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 84099551 is about 9170.5807340648. The cubic root of 84099551 is about 438.1248558102.

The spelling of 84099551 in words is "eighty-four million, ninety-nine thousand, five hundred fifty-one".