97191970391 has 8 divisors (see below), whose sum is σ = 98032167024. Its totient is φ = 96354748800.

The previous prime is 97191970387. The next prime is 97191970399. The reversal of 97191970391 is 19307919179.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97191970391 - 2² = 97191970387 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 (97191970399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 678116 + ... + 808841.

It is an arithmetic number, because the mean of its divisors is an integer number (12254020878).

Almost surely, 2^97191970391 is an apocalyptic number.

97191970391 is a deficient number, since it is larger than the sum of its proper divisors (840196633).

97191970391 is a wasteful number, since it uses less digits than its factorization.

97191970391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487521.

The product of its (nonzero) digits is 964467, while the sum is 56.

The spelling of 97191970391 in words is "ninety-seven billion, one hundred ninety-one million, nine hundred seventy thousand, three hundred ninety-one".