97151321 has 2 divisors, whose sum is σ = 97151322. Its totient is φ = 97151320.

The previous prime is 97151309. The next prime is 97151357. The reversal of 97151321 is 12315179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66504025 + 30647296 = 8155^2 + 5536^2 .

It is a cyclic number.

It is not a de Polignac number, because 97151321 - 2²² = 92957017 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97151521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48575660 + 48575661.

It is an arithmetic number, because the mean of its divisors is an integer number (48575661).

Almost surely, 2^97151321 is an apocalyptic number.

It is an amenable number.

97151321 is a deficient number, since it is larger than the sum of its proper divisors (1).

97151321 is an equidigital number, since it uses as much as digits as its factorization.

97151321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 29.

The square root of 97151321 is about 9856.5369679213. The cubic root of 97151321 is about 459.7088911112.

The spelling of 97151321 in words is "ninety-seven million, one hundred fifty-one thousand, three hundred twenty-one".