97610628281 has 2 divisors, whose sum is σ = 97610628282. Its totient is φ = 97610628280.

The previous prime is 97610628277. The next prime is 97610628287. The reversal of 97610628281 is 18282601679.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66980028025 + 30630600256 = 258805^2 + 175016^2 .

It is an emirp because it is prime and its reverse (18282601679) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97610628281 - 2² = 97610628277 is a prime.

It is a super-2 number, since 2×97610628281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97610628287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48805314140 + 48805314141.

It is an arithmetic number, because the mean of its divisors is an integer number (48805314141).

Almost surely, 2^97610628281 is an apocalyptic number.

It is an amenable number.

97610628281 is a deficient number, since it is larger than the sum of its proper divisors (1).

97610628281 is an equidigital number, since it uses as much as digits as its factorization.

97610628281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 97610628281 in words is "ninety-seven billion, six hundred ten million, six hundred twenty-eight thousand, two hundred eighty-one".