909099901 has 2 divisors, whose sum is σ = 909099902. Its totient is φ = 909099900.

The previous prime is 909099881. The next prime is 909099967. The reversal of 909099901 is 109990909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 506295001 + 402804900 = 22501^2 + 20070^2 .

It is a cyclic number.

It is not a de Polignac number, because 909099901 - 2⁵ = 909099869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (909099001) 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, 454549950 + 454549951.

It is an arithmetic number, because the mean of its divisors is an integer number (454549951).

Almost surely, 2^909099901 is an apocalyptic number.

It is an amenable number.

909099901 is a deficient number, since it is larger than the sum of its proper divisors (1).

909099901 is an equidigital number, since it uses as much as digits as its factorization.

909099901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59049, while the sum is 46.

The square root of 909099901 is about 30151.2835713507. The cubic root of 909099901 is about 968.7325000737.

It can be divided in two parts, 90909 and 9901, that multiplied together give a palindrome (900090009).

The spelling of 909099901 in words is "nine hundred nine million, ninety-nine thousand, nine hundred one".