97207912421 has 2 divisors, whose sum is σ = 97207912422. Its totient is φ = 97207912420.

The previous prime is 97207912411. The next prime is 97207912511. The reversal of 97207912421 is 12421970279.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91800516196 + 5407396225 = 302986^2 + 73535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97207912421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97207912411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48603956210 + 48603956211.

It is an arithmetic number, because the mean of its divisors is an integer number (48603956211).

Almost surely, 2^97207912421 is an apocalyptic number.

It is an amenable number.

97207912421 is a deficient number, since it is larger than the sum of its proper divisors (1).

97207912421 is an equidigital number, since it uses as much as digits as its factorization.

97207912421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 97207912421 in words is "ninety-seven billion, two hundred seven million, nine hundred twelve thousand, four hundred twenty-one".