920840815957297 has 2 divisors, whose sum is σ = 920840815957298. Its totient is φ = 920840815957296.

The previous prime is 920840815957267. The next prime is 920840815957417. The reversal of 920840815957297 is 792759518048029.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 570477890933041 + 350362925024256 = 23884679^2 + 18717984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920840815957297 is a prime.

It is not a weakly prime, because it can be changed into another prime (920840815957267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460420407978648 + 460420407978649.

It is an arithmetic number, because the mean of its divisors is an integer number (460420407978649).

Almost surely, 2^{920840815957297} is an apocalyptic number.

It is an amenable number.

920840815957297 is a deficient number, since it is larger than the sum of its proper divisors (1).

920840815957297 is an equidigital number, since it uses as much as digits as its factorization.

920840815957297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 914457600, while the sum is 76.

The spelling of 920840815957297 in words is "nine hundred twenty trillion, eight hundred forty billion, eight hundred fifteen million, nine hundred fifty-seven thousand, two hundred ninety-seven".