61636241 has 2 divisors, whose sum is σ = 61636242. Its totient is φ = 61636240.

The previous prime is 61636231. The next prime is 61636249. The reversal of 61636241 is 14263616.

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., 32433025 + 29203216 = 5695^2 + 5404^2 .

It is a cyclic number.

It is not a de Polignac number, because 61636241 - 2⁶ = 61636177 is a prime.

It is a super-2 number, since 2×61636241² = 7598052409220162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (61636249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30818120 + 30818121.

It is an arithmetic number, because the mean of its divisors is an integer number (30818121).

Almost surely, 2^61636241 is an apocalyptic number.

It is an amenable number.

61636241 is a deficient number, since it is larger than the sum of its proper divisors (1).

61636241 is an equidigital number, since it uses as much as digits as its factorization.

61636241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

The square root of 61636241 is about 7850.8751741446. The cubic root of 61636241 is about 395.0135999163.

Adding to 61636241 its reverse (14263616), we get a palindrome (75899857).

The spelling of 61636241 in words is "sixty-one million, six hundred thirty-six thousand, two hundred forty-one".