61215097 has 2 divisors, whose sum is σ = 61215098. Its totient is φ = 61215096.

The previous prime is 61215083. The next prime is 61215107. The reversal of 61215097 is 79051216.

61215097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61214976 + 121 = 7824^2 + 11^2 .

It is a cyclic number.

It is not a de Polignac number, because 61215097 - 2¹¹ = 61213049 is a prime.

It is not a weakly prime, because it can be changed into another prime (61215047) 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, 30607548 + 30607549.

It is an arithmetic number, because the mean of its divisors is an integer number (30607549).

Almost surely, 2^61215097 is an apocalyptic number.

It is an amenable number.

61215097 is a deficient number, since it is larger than the sum of its proper divisors (1).

61215097 is an equidigital number, since it uses as much as digits as its factorization.

61215097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 61215097 is about 7824.0077326138. The cubic root of 61215097 is about 394.1118688240. Note that the first 3 decimals are identical.

The spelling of 61215097 in words is "sixty-one million, two hundred fifteen thousand, ninety-seven".