97249907509 has 2 divisors, whose sum is σ = 97249907510. Its totient is φ = 97249907508.

The previous prime is 97249907453. The next prime is 97249907533. The reversal of 97249907509 is 90570994279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88342700625 + 8907206884 = 297225^2 + 94378^2 .

It is an emirp because it is prime and its reverse (90570994279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97249907509 - 2¹¹ = 97249905461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97249907009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48624953754 + 48624953755.

It is an arithmetic number, because the mean of its divisors is an integer number (48624953755).

Almost surely, 2^97249907509 is an apocalyptic number.

It is an amenable number.

97249907509 is a deficient number, since it is larger than the sum of its proper divisors (1).

97249907509 is an equidigital number, since it uses as much as digits as its factorization.

97249907509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12859560, while the sum is 61.

The spelling of 97249907509 in words is "ninety-seven billion, two hundred forty-nine million, nine hundred seven thousand, five hundred nine".