651863 has 2 divisors, whose sum is σ = 651864. Its totient is φ = 651862.

The previous prime is 651857. The next prime is 651869. The reversal of 651863 is 368156.

It is a balanced prime because it is at equal distance from previous prime (651857) and next prime (651869).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651863 is a prime.

It is equal to p₅₂₉₅₈ and since 651863 and 52958 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325931 + 325932.

It is an arithmetic number, because the mean of its divisors is an integer number (325932).

2⁶⁵¹⁸⁶³ is an apocalyptic number.

651863 is a deficient number, since it is larger than the sum of its proper divisors (1).

651863 is an equidigital number, since it uses as much as digits as its factorization.

651863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 651863 is about 807.3803316901. The cubic root of 651863 is about 86.7065907444.

The spelling of 651863 in words is "six hundred fifty-one thousand, eight hundred sixty-three".