920820547 has 2 divisors, whose sum is σ = 920820548. Its totient is φ = 920820546.

The previous prime is 920820491. The next prime is 920820553. The reversal of 920820547 is 745028029.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 920820547 - 2¹⁹ = 920296259 is a prime.

It is not a weakly prime, because it can be changed into another prime (920820577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460410273 + 460410274.

It is an arithmetic number, because the mean of its divisors is an integer number (460410274).

Almost surely, 2^920820547 is an apocalyptic number.

920820547 is a deficient number, since it is larger than the sum of its proper divisors (1).

920820547 is an equidigital number, since it uses as much as digits as its factorization.

920820547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 920820547 is about 30345.0250782562. The cubic root of 920820547 is about 972.8778906028.

The spelling of 920820547 in words is "nine hundred twenty million, eight hundred twenty thousand, five hundred forty-seven".