97729788371 has 2 divisors, whose sum is σ = 97729788372. Its totient is φ = 97729788370.

The previous prime is 97729788337. The next prime is 97729788397. The reversal of 97729788371 is 17388792779.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97729788371 is a prime.

It is a super-2 number, since 2×97729788371² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97729787371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48864894185 + 48864894186.

It is an arithmetic number, because the mean of its divisors is an integer number (48864894186).

Almost surely, 2^97729788371 is an apocalyptic number.

97729788371 is a deficient number, since it is larger than the sum of its proper divisors (1).

97729788371 is an equidigital number, since it uses as much as digits as its factorization.

97729788371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74680704, while the sum is 68.

The spelling of 97729788371 in words is "ninety-seven billion, seven hundred twenty-nine million, seven hundred eighty-eight thousand, three hundred seventy-one".