97540549 has 2 divisors, whose sum is σ = 97540550. Its totient is φ = 97540548.

The previous prime is 97540537. The next prime is 97540571. The reversal of 97540549 is 94504579.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85932900 + 11607649 = 9270^2 + 3407^2 .

It is a cyclic number.

It is not a de Polignac number, because 97540549 - 2²³ = 89151941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97540519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48770274 + 48770275.

It is an arithmetic number, because the mean of its divisors is an integer number (48770275).

Almost surely, 2^97540549 is an apocalyptic number.

It is an amenable number.

97540549 is a deficient number, since it is larger than the sum of its proper divisors (1).

97540549 is an equidigital number, since it uses as much as digits as its factorization.

97540549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 97540549 is about 9876.2618940569. The cubic root of 97540549 is about 460.3220004447.

It can be divided in two parts, 97540 and 549, that added together give a palindrome (98089).

The spelling of 97540549 in words is "ninety-seven million, five hundred forty thousand, five hundred forty-nine".