920780797 has 2 divisors, whose sum is σ = 920780798. Its totient is φ = 920780796.

The previous prime is 920780789. The next prime is 920780803. The reversal of 920780797 is 797087029.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 910470276 + 10310521 = 30174^2 + 3211^2 .

It is a cyclic number.

It is not a de Polignac number, because 920780797 - 2³ = 920780789 is a prime.

It is a super-2 number, since 2×920780797² = 1695674552247910418, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 920780797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (920780767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460390398 + 460390399.

It is an arithmetic number, because the mean of its divisors is an integer number (460390399).

Almost surely, 2^920780797 is an apocalyptic number.

It is an amenable number.

920780797 is a deficient number, since it is larger than the sum of its proper divisors (1).

920780797 is an equidigital number, since it uses as much as digits as its factorization.

920780797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 920780797 is about 30344.3701038595. The cubic root of 920780797 is about 972.8638913305.

The spelling of 920780797 in words is "nine hundred twenty million, seven hundred eighty thousand, seven hundred ninety-seven".