61689263 has 2 divisors, whose sum is σ = 61689264. Its totient is φ = 61689262.

The previous prime is 61689259. The next prime is 61689281. The reversal of 61689263 is 36298616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61689263 - 2² = 61689259 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61689263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61689203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30844631 + 30844632.

It is an arithmetic number, because the mean of its divisors is an integer number (30844632).

Almost surely, 2^61689263 is an apocalyptic number.

61689263 is a deficient number, since it is larger than the sum of its proper divisors (1).

61689263 is an equidigital number, since it uses as much as digits as its factorization.

61689263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 61689263 is about 7854.2512692172. The cubic root of 61689263 is about 395.1268363709.

The spelling of 61689263 in words is "sixty-one million, six hundred eighty-nine thousand, two hundred sixty-three".