99503558471909 has 2 divisors, whose sum is σ = 99503558471910. Its totient is φ = 99503558471908.

The previous prime is 99503558471881. The next prime is 99503558471927. The reversal of 99503558471909 is 90917485530599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73427246860900 + 26076311611009 = 8568970^2 + 5106497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99503558471909 is a prime.

It is a super-2 number, since 2×99503558471909² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99503558471609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49751779235954 + 49751779235955.

It is an arithmetic number, because the mean of its divisors is an integer number (49751779235955).

Almost surely, 2^{99503558471909} is an apocalyptic number.

It is an amenable number.

99503558471909 is a deficient number, since it is larger than the sum of its proper divisors (1).

99503558471909 is an equidigital number, since it uses as much as digits as its factorization.

99503558471909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 551124000, while the sum is 74.

The spelling of 99503558471909 in words is "ninety-nine trillion, five hundred three billion, five hundred fifty-eight million, four hundred seventy-one thousand, nine hundred nine".