61900261 has 2 divisors, whose sum is σ = 61900262. Its totient is φ = 61900260.

The previous prime is 61900243. The next prime is 61900327. The reversal of 61900261 is 16200916.

61900261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61308900 + 591361 = 7830^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 61900261 - 2⁵ = 61900229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61900361) 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, 30950130 + 30950131.

It is an arithmetic number, because the mean of its divisors is an integer number (30950131).

Almost surely, 2^61900261 is an apocalyptic number.

It is an amenable number.

61900261 is a deficient number, since it is larger than the sum of its proper divisors (1).

61900261 is an equidigital number, since it uses as much as digits as its factorization.

61900261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 61900261 is about 7867.6718919894. The cubic root of 61900261 is about 395.5768125695.

The spelling of 61900261 in words is "sixty-one million, nine hundred thousand, two hundred sixty-one".