61871783 has 2 divisors, whose sum is σ = 61871784. Its totient is φ = 61871782.

The previous prime is 61871699. The next prime is 61871827. The reversal of 61871783 is 38717816.

61871783 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61871783 - 2²² = 57677479 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61871783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61871683) 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, 30935891 + 30935892.

It is an arithmetic number, because the mean of its divisors is an integer number (30935892).

Almost surely, 2^61871783 is an apocalyptic number.

61871783 is a deficient number, since it is larger than the sum of its proper divisors (1).

61871783 is an equidigital number, since it uses as much as digits as its factorization.

61871783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 41.

The square root of 61871783 is about 7865.8618726749. The cubic root of 61871783 is about 395.5161398879.

The spelling of 61871783 in words is "sixty-one million, eight hundred seventy-one thousand, seven hundred eighty-three".