920545091 has 2 divisors, whose sum is σ = 920545092. Its totient is φ = 920545090.

The previous prime is 920545063. The next prime is 920545139. The reversal of 920545091 is 190545029.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 920545091 - 2⁶ = 920545027 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (920545061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460272545 + 460272546.

It is an arithmetic number, because the mean of its divisors is an integer number (460272546).

Almost surely, 2^920545091 is an apocalyptic number.

920545091 is a deficient number, since it is larger than the sum of its proper divisors (1).

920545091 is an equidigital number, since it uses as much as digits as its factorization.

920545091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 920545091 is about 30340.4860046770. The cubic root of 920545091 is about 972.7808714172.

The spelling of 920545091 in words is "nine hundred twenty million, five hundred forty-five thousand, ninety-one".