97990041509 has 2 divisors, whose sum is σ = 97990041510. Its totient is φ = 97990041508.

The previous prime is 97990041469. The next prime is 97990041551. The reversal of 97990041509 is 90514009979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73056684100 + 24933357409 = 270290^2 + 157903^2 .

It is an emirp because it is prime and its reverse (90514009979) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97990041509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97995041509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48995020754 + 48995020755.

It is an arithmetic number, because the mean of its divisors is an integer number (48995020755).

Almost surely, 2^97990041509 is an apocalyptic number.

It is an amenable number.

97990041509 is a deficient number, since it is larger than the sum of its proper divisors (1).

97990041509 is an equidigital number, since it uses as much as digits as its factorization.

97990041509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 918540, while the sum is 53.

The spelling of 97990041509 in words is "ninety-seven billion, nine hundred ninety million, forty-one thousand, five hundred nine".