61380101 has 2 divisors, whose sum is σ = 61380102. Its totient is φ = 61380100.

The previous prime is 61380097. The next prime is 61380133. The reversal of 61380101 is 10108316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53949025 + 7431076 = 7345^2 + 2726^2 .

It is a cyclic number.

It is not a de Polignac number, because 61380101 - 2² = 61380097 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61380191) 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, 30690050 + 30690051.

It is an arithmetic number, because the mean of its divisors is an integer number (30690051).

Almost surely, 2^61380101 is an apocalyptic number.

It is an amenable number.

61380101 is a deficient number, since it is larger than the sum of its proper divisors (1).

61380101 is an equidigital number, since it uses as much as digits as its factorization.

61380101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 61380101 is about 7834.5453601342. The cubic root of 61380101 is about 394.4656578744.

Adding to 61380101 its reverse (10108316), we get a palindrome (71488417).

The spelling of 61380101 in words is "sixty-one million, three hundred eighty thousand, one hundred one".