97991714881 has 2 divisors, whose sum is σ = 97991714882. Its totient is φ = 97991714880.

The previous prime is 97991714867. The next prime is 97991714897. The reversal of 97991714881 is 18841719979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60918137856 + 37073577025 = 246816^2 + 192545^2 .

It is a cyclic number.

It is not a de Polignac number, because 97991714881 - 2¹⁹ = 97991190593 is a prime.

It is a super-2 number, since 2×97991714881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97991714831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48995857440 + 48995857441.

It is an arithmetic number, because the mean of its divisors is an integer number (48995857441).

Almost surely, 2^97991714881 is an apocalyptic number.

It is an amenable number.

97991714881 is a deficient number, since it is larger than the sum of its proper divisors (1).

97991714881 is an equidigital number, since it uses as much as digits as its factorization.

97991714881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9144576, while the sum is 64.

The spelling of 97991714881 in words is "ninety-seven billion, nine hundred ninety-one million, seven hundred fourteen thousand, eight hundred eighty-one".