99603551 has 2 divisors, whose sum is σ = 99603552. Its totient is φ = 99603550.

The previous prime is 99603509. The next prime is 99603571. The reversal of 99603551 is 15530699.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99603551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99603571) 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, 49801775 + 49801776.

It is an arithmetic number, because the mean of its divisors is an integer number (49801776).

Almost surely, 2^99603551 is an apocalyptic number.

99603551 is a deficient number, since it is larger than the sum of its proper divisors (1).

99603551 is an equidigital number, since it uses as much as digits as its factorization.

99603551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 99603551 is about 9980.1578644829. The cubic root of 99603551 is about 463.5446865686.

The spelling of 99603551 in words is "ninety-nine million, six hundred three thousand, five hundred fifty-one".