97137281 has 2 divisors, whose sum is σ = 97137282. Its totient is φ = 97137280.

The previous prime is 97137277. The next prime is 97137311. The reversal of 97137281 is 18273179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54626881 + 42510400 = 7391^2 + 6520^2 .

It is an emirp because it is prime and its reverse (18273179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97137281 - 2² = 97137277 is a prime.

It is a super-2 number, since 2×97137281² = 18871302720145922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97137221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48568640 + 48568641.

It is an arithmetic number, because the mean of its divisors is an integer number (48568641).

Almost surely, 2^97137281 is an apocalyptic number.

It is an amenable number.

97137281 is a deficient number, since it is larger than the sum of its proper divisors (1).

97137281 is an equidigital number, since it uses as much as digits as its factorization.

97137281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 38.

The square root of 97137281 is about 9855.8247244967. The cubic root of 97137281 is about 459.6867448220.

The spelling of 97137281 in words is "ninety-seven million, one hundred thirty-seven thousand, two hundred eighty-one".