4091209901 has 2 divisors, whose sum is σ = 4091209902. Its totient is φ = 4091209900.

The previous prime is 4091209879. The next prime is 4091209907. The reversal of 4091209901 is 1099021904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3540369001 + 550840900 = 59501^2 + 23470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4091209901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4091209907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2045604950 + 2045604951.

It is an arithmetic number, because the mean of its divisors is an integer number (2045604951).

Almost surely, 2^4091209901 is an apocalyptic number.

It is an amenable number.

4091209901 is a deficient number, since it is larger than the sum of its proper divisors (1).

4091209901 is an equidigital number, since it uses as much as digits as its factorization.

4091209901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 4091209901 is about 63962.5664041086. The cubic root of 4091209901 is about 1599.3760459001.

The spelling of 4091209901 in words is "four billion, ninety-one million, two hundred nine thousand, nine hundred one".