97315921421 has 8 divisors (see below), whose sum is σ = 97955310744. Its totient is φ = 96677416000.

The previous prime is 97315921403. The next prime is 97315921447. The reversal of 97315921421 is 12412951379.

It can be written as a sum of positive squares in 4 ways, for example, as 23516222500 + 73799698921 = 153350^2 + 271661^2 .

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 97315921421 - 2¹⁸ = 97315659277 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 (97315921321) 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, 671 + ... + 441171.

It is an arithmetic number, because the mean of its divisors is an integer number (12244413843).

Almost surely, 2^97315921421 is an apocalyptic number.

It is an amenable number.

97315921421 is a deficient number, since it is larger than the sum of its proper divisors (639389323).

97315921421 is a wasteful number, since it uses less digits than its factorization.

97315921421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441951.

The product of its digits is 136080, while the sum is 44.

The spelling of 97315921421 in words is "ninety-seven billion, three hundred fifteen million, nine hundred twenty-one thousand, four hundred twenty-one".