61487773 has 2 divisors, whose sum is σ = 61487774. Its totient is φ = 61487772.

The previous prime is 61487771. The next prime is 61487779. The reversal of 61487773 is 37778416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39463524 + 22024249 = 6282^2 + 4693^2 .

It is a cyclic number.

It is not a de Polignac number, because 61487773 - 2¹ = 61487771 is a prime.

Together with 61487771, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61487771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30743886 + 30743887.

It is an arithmetic number, because the mean of its divisors is an integer number (30743887).

Almost surely, 2^61487773 is an apocalyptic number.

It is an amenable number.

61487773 is a deficient number, since it is larger than the sum of its proper divisors (1).

61487773 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 11 representation: 61487773 = (31787746)₁₁.

61487773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 43.

The square root of 61487773 is about 7841.4139668812. The cubic root of 61487773 is about 394.6961782695.

The spelling of 61487773 in words is "sixty-one million, four hundred eighty-seven thousand, seven hundred seventy-three".