97930191843 has 48 divisors (see below), whose sum is σ = 161100482400. Its totient is φ = 56779107840.

The previous prime is 97930191839. The next prime is 97930191851. The reversal of 97930191843 is 34819103979.

It is a happy number.

It is a Cunningham number, because it is equal to 312938²-1.

It is not a de Polignac number, because 97930191843 - 2² = 97930191839 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 97930191843.

It is not an unprimeable number, because it can be changed into a prime (97930191893) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 156471 + ... + 469407.

It is an arithmetic number, because the mean of its divisors is an integer number (3356260050).

Almost surely, 2^97930191843 is an apocalyptic number.

97930191843 is a deficient number, since it is larger than the sum of its proper divisors (63170290557).

97930191843 is a wasteful number, since it uses less digits than its factorization.

97930191843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313092 (or 313089 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 97930191843 in words is "ninety-seven billion, nine hundred thirty million, one hundred ninety-one thousand, eight hundred forty-three".