91430201 has 2 divisors, whose sum is σ = 91430202. Its totient is φ = 91430200.

The previous prime is 91430189. The next prime is 91430203. The reversal of 91430201 is 10203419.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72931600 + 18498601 = 8540^2 + 4301^2 .

It is a cyclic number.

It is not a de Polignac number, because 91430201 - 2⁶ = 91430137 is a prime.

Together with 91430203, 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 (91430203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45715100 + 45715101.

It is an arithmetic number, because the mean of its divisors is an integer number (45715101).

Almost surely, 2^91430201 is an apocalyptic number.

It is an amenable number.

91430201 is a deficient number, since it is larger than the sum of its proper divisors (1).

91430201 is an equidigital number, since it uses as much as digits as its factorization.

91430201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 91430201 is about 9561.9140866251. The cubic root of 91430201 is about 450.5018286427.

The spelling of 91430201 in words is "ninety-one million, four hundred thirty thousand, two hundred one".