64871783 has 2 divisors, whose sum is σ = 64871784. Its totient is φ = 64871782.

The previous prime is 64871759. The next prime is 64871803. The reversal of 64871783 is 38717846.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64871783 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64871383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32435891 + 32435892.

It is an arithmetic number, because the mean of its divisors is an integer number (32435892).

Almost surely, 2^64871783 is an apocalyptic number.

64871783 is a deficient number, since it is larger than the sum of its proper divisors (1).

64871783 is an equidigital number, since it uses as much as digits as its factorization.

64871783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 64871783 is about 8054.3021423336. The cubic root of 64871783 is about 401.8080298402.

The spelling of 64871783 in words is "sixty-four million, eight hundred seventy-one thousand, seven hundred eighty-three".