97893807791 has 4 divisors (see below), whose sum is σ = 105424100712. Its totient is φ = 90363514872.

The previous prime is 97893807763. The next prime is 97893807821. The reversal of 97893807791 is 19770839879.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97893807791 - 2²² = 97889613487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97893807091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3765146441 + ... + 3765146466.

It is an arithmetic number, because the mean of its divisors is an integer number (26356025178).

Almost surely, 2^97893807791 is an apocalyptic number.

97893807791 is a deficient number, since it is larger than the sum of its proper divisors (7530292921).

97893807791 is a wasteful number, since it uses less digits than its factorization.

97893807791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530292920.

The product of its (nonzero) digits is 48009024, while the sum is 68.

The spelling of 97893807791 in words is "ninety-seven billion, eight hundred ninety-three million, eight hundred seven thousand, seven hundred ninety-one".