97691878267 has 2 divisors, whose sum is σ = 97691878268. Its totient is φ = 97691878266.

The previous prime is 97691878243. The next prime is 97691878279. The reversal of 97691878267 is 76287819679.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97691878267 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97691878196 and 97691878205.

It is not a weakly prime, because it can be changed into another prime (97691878667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48845939133 + 48845939134.

It is an arithmetic number, because the mean of its divisors is an integer number (48845939134).

Almost surely, 2^97691878267 is an apocalyptic number.

97691878267 is a deficient number, since it is larger than the sum of its proper divisors (1).

97691878267 is an equidigital number, since it uses as much as digits as its factorization.

97691878267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128024064, while the sum is 70.

The spelling of 97691878267 in words is "ninety-seven billion, six hundred ninety-one million, eight hundred seventy-eight thousand, two hundred sixty-seven".