8920559797949 has 2 divisors, whose sum is σ = 8920559797950. Its totient is φ = 8920559797948.

The previous prime is 8920559797913. The next prime is 8920559798027. The reversal of 8920559797949 is 9497979550298.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4796078100025 + 4124481697924 = 2189995^2 + 2030882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8920559797949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8920559737949) 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, 4460279898974 + 4460279898975.

It is an arithmetic number, because the mean of its divisors is an integer number (4460279898975).

Almost surely, 2^{8920559797949} is an apocalyptic number.

It is an amenable number.

8920559797949 is a deficient number, since it is larger than the sum of its proper divisors (1).

8920559797949 is an equidigital number, since it uses as much as digits as its factorization.

8920559797949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4629441600, while the sum is 83.

The spelling of 8920559797949 in words is "eight trillion, nine hundred twenty billion, five hundred fifty-nine million, seven hundred ninety-seven thousand, nine hundred forty-nine".