97990041553 has 2 divisors, whose sum is σ = 97990041554. Its totient is φ = 97990041552.

The previous prime is 97990041551. The next prime is 97990041557. The reversal of 97990041553 is 35514009979.

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., 78054860689 + 19935180864 = 279383^2 + 141192^2 .

It is a cyclic number.

It is not a de Polignac number, because 97990041553 - 2¹ = 97990041551 is a prime.

Together with 97990041551, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 97990041553.

It is not a weakly prime, because it can be changed into another prime (97990041551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48995020776 + 48995020777.

It is an arithmetic number, because the mean of its divisors is an integer number (48995020777).

Almost surely, 2^97990041553 is an apocalyptic number.

It is an amenable number.

97990041553 is a deficient number, since it is larger than the sum of its proper divisors (1).

97990041553 is an equidigital number, since it uses as much as digits as its factorization.

97990041553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1530900, while the sum is 52.

The spelling of 97990041553 in words is "ninety-seven billion, nine hundred ninety million, forty-one thousand, five hundred fifty-three".