99603991201 has 27 divisors (see below), whose sum is σ = 118605334323. Its totient is φ = 83545896720.

The previous prime is 99603991183. The next prime is 99603991237. The reversal of 99603991201 is 10219930699.

The square root of 99603991201 is 315601.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 14734318225 + 84869672976 = 121385^2 + 291324^2 .

It is not a de Polignac number, because 99603991201 - 2¹³ = 99603983009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99603991271) 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 in 26 ways as a sum of consecutive naturals, for example, 45129840 + ... + 45132046.

Almost surely, 2^99603991201 is an apocalyptic number.

99603991201 is the 315601-st square number.

99603991201 is the 157801-st centered octagonal number.

It is an amenable number.

99603991201 is a deficient number, since it is larger than the sum of its proper divisors (19001343122).

99603991201 is an equidigital number, since it uses as much as digits as its factorization.

99603991201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462 (or 2231 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 49.

Multiplying 99603991201 by its sum of digits (49), we get a square (4880595568849 = 2209207²).

The spelling of 99603991201 in words is "ninety-nine billion, six hundred three million, nine hundred ninety-one thousand, two hundred one".