61190209 has 2 divisors, whose sum is σ = 61190210. Its totient is φ = 61190208.

The previous prime is 61190201. The next prime is 61190243. The reversal of 61190209 is 90209116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44355600 + 16834609 = 6660^2 + 4103^2 .

It is a cyclic number.

It is not a de Polignac number, because 61190209 - 2³ = 61190201 is a prime.

It is not a weakly prime, because it can be changed into another prime (61190201) 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, 30595104 + 30595105.

It is an arithmetic number, because the mean of its divisors is an integer number (30595105).

Almost surely, 2^61190209 is an apocalyptic number.

It is an amenable number.

61190209 is a deficient number, since it is larger than the sum of its proper divisors (1).

61190209 is an equidigital number, since it uses as much as digits as its factorization.

61190209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 61190209 is about 7822.4170816954. The cubic root of 61190209 is about 394.0584507063.

The spelling of 61190209 in words is "sixty-one million, one hundred ninety thousand, two hundred nine".