61540097 has 2 divisors, whose sum is σ = 61540098. Its totient is φ = 61540096.

The previous prime is 61540093. The next prime is 61540099. The reversal of 61540097 is 79004516.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61089856 + 450241 = 7816^2 + 671^2 .

It is a cyclic number.

It is not a de Polignac number, because 61540097 - 2² = 61540093 is a prime.

Together with 61540099, 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 (61540093) 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, 30770048 + 30770049.

It is an arithmetic number, because the mean of its divisors is an integer number (30770049).

Almost surely, 2^61540097 is an apocalyptic number.

It is an amenable number.

61540097 is a deficient number, since it is larger than the sum of its proper divisors (1).

61540097 is an equidigital number, since it uses as much as digits as its factorization.

61540097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 61540097 is about 7844.7496454635. The cubic root of 61540097 is about 394.8081041940.

The spelling of 61540097 in words is "sixty-one million, five hundred forty thousand, ninety-seven".