611804863 has 2 divisors, whose sum is σ = 611804864. Its totient is φ = 611804862.

The previous prime is 611804861. The next prime is 611804881. The reversal of 611804863 is 368408116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 611804863 - 2¹ = 611804861 is a prime.

Together with 611804861, 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 (611804861) 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, 305902431 + 305902432.

It is an arithmetic number, because the mean of its divisors is an integer number (305902432).

Almost surely, 2^611804863 is an apocalyptic number.

611804863 is a deficient number, since it is larger than the sum of its proper divisors (1).

611804863 is an equidigital number, since it uses as much as digits as its factorization.

611804863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 611804863 is about 24734.6894664154. The cubic root of 611804863 is about 848.9282284016.

The spelling of 611804863 in words is "six hundred eleven million, eight hundred four thousand, eight hundred sixty-three".