920211091 has 2 divisors, whose sum is σ = 920211092. Its totient is φ = 920211090.

The previous prime is 920211079. The next prime is 920211107. The reversal of 920211091 is 190112029.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920211091 is a prime.

It is not a weakly prime, because it can be changed into another prime (920211001) 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, 460105545 + 460105546.

It is an arithmetic number, because the mean of its divisors is an integer number (460105546).

Almost surely, 2^920211091 is an apocalyptic number.

920211091 is a deficient number, since it is larger than the sum of its proper divisors (1).

920211091 is an equidigital number, since it uses as much as digits as its factorization.

920211091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 920211091 is about 30334.9813087135. The cubic root of 920211091 is about 972.6632063086.

The spelling of 920211091 in words is "nine hundred twenty million, two hundred eleven thousand, ninety-one".