97587491 has 2 divisors, whose sum is σ = 97587492. Its totient is φ = 97587490.

The previous prime is 97587487. The next prime is 97587493. The reversal of 97587491 is 19478579.

It is a strong prime.

It is an emirp because it is prime and its reverse (19478579) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97587491 - 2² = 97587487 is a prime.

It is a Sophie Germain prime.

Together with 97587493, 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 (97587493) 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, 48793745 + 48793746.

It is an arithmetic number, because the mean of its divisors is an integer number (48793746).

Almost surely, 2^97587491 is an apocalyptic number.

97587491 is a deficient number, since it is larger than the sum of its proper divisors (1).

97587491 is an equidigital number, since it uses as much as digits as its factorization.

97587491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 50.

The square root of 97587491 is about 9878.6381146391. The cubic root of 97587491 is about 460.3958328836.

The spelling of 97587491 in words is "ninety-seven million, five hundred eighty-seven thousand, four hundred ninety-one".