99321601 has 2 divisors, whose sum is σ = 99321602. Its totient is φ = 99321600.

The previous prime is 99321587. The next prime is 99321619. The reversal of 99321601 is 10612399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68807025 + 30514576 = 8295^2 + 5524^2 .

It is a cyclic number.

It is not a de Polignac number, because 99321601 - 2¹¹ = 99319553 is a prime.

It is not a weakly prime, because it can be changed into another prime (99321631) 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, 49660800 + 49660801.

It is an arithmetic number, because the mean of its divisors is an integer number (49660801).

Almost surely, 2^99321601 is an apocalyptic number.

It is an amenable number.

99321601 is a deficient number, since it is larger than the sum of its proper divisors (1).

99321601 is an equidigital number, since it uses as much as digits as its factorization.

99321601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 99321601 is about 9966.0223258831. The cubic root of 99321601 is about 463.1068844383.

The spelling of 99321601 in words is "ninety-nine million, three hundred twenty-one thousand, six hundred one".