99511001 has 2 divisors, whose sum is σ = 99511002. Its totient is φ = 99511000.

The previous prime is 99510997. The next prime is 99511003. The reversal of 99511001 is 10011599.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98406400 + 1104601 = 9920^2 + 1051^2 .

It is a cyclic number.

It is not a de Polignac number, because 99511001 - 2² = 99510997 is a prime.

Together with 99511003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99511003) 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 as a sum of consecutive naturals, namely, 49755500 + 49755501.

It is an arithmetic number, because the mean of its divisors is an integer number (49755501).

Almost surely, 2^99511001 is an apocalyptic number.

It is an amenable number.

99511001 is a deficient number, since it is larger than the sum of its proper divisors (1).

99511001 is an equidigital number, since it uses as much as digits as its factorization.

99511001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405, while the sum is 26.

The square root of 99511001 is about 9975.5200866922. The cubic root of 99511001 is about 463.4010693487.

The spelling of 99511001 in words is "ninety-nine million, five hundred eleven thousand, one".