61145783 has 2 divisors, whose sum is σ = 61145784. Its totient is φ = 61145782.

The previous prime is 61145767. The next prime is 61145803. The reversal of 61145783 is 38754116.

61145783 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 is a cyclic number.

It is not a de Polignac number, because 61145783 - 2⁴ = 61145767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61145723) 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, 30572891 + 30572892.

It is an arithmetic number, because the mean of its divisors is an integer number (30572892).

Almost surely, 2^61145783 is an apocalyptic number.

61145783 is a deficient number, since it is larger than the sum of its proper divisors (1).

61145783 is an equidigital number, since it uses as much as digits as its factorization.

61145783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 61145783 is about 7819.5769067130. The cubic root of 61145783 is about 393.9630613759.

Adding to 61145783 its reverse (38754116), we get a palindrome (99899899).

The spelling of 61145783 in words is "sixty-one million, one hundred forty-five thousand, seven hundred eighty-three".