97142321 has 2 divisors, whose sum is σ = 97142322. Its totient is φ = 97142320.

The previous prime is 97142273. The next prime is 97142323. The reversal of 97142321 is 12324179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96805921 + 336400 = 9839^2 + 580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97142321 is a prime.

Together with 97142323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97142323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48571160 + 48571161.

It is an arithmetic number, because the mean of its divisors is an integer number (48571161).

Almost surely, 2^97142321 is an apocalyptic number.

It is an amenable number.

97142321 is a deficient number, since it is larger than the sum of its proper divisors (1).

97142321 is an equidigital number, since it uses as much as digits as its factorization.

97142321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 29.

The square root of 97142321 is about 9856.0804075454. The cubic root of 97142321 is about 459.6946950175.

The spelling of 97142321 in words is "ninety-seven million, one hundred forty-two thousand, three hundred twenty-one".