868256437 has 2 divisors, whose sum is σ = 868256438. Its totient is φ = 868256436.

The previous prime is 868256423. The next prime is 868256461. The reversal of 868256437 is 734652868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 856791441 + 11464996 = 29271^2 + 3386^2 .

It is a cyclic number.

It is not a de Polignac number, because 868256437 - 2⁷ = 868256309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868256537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434128218 + 434128219.

It is an arithmetic number, because the mean of its divisors is an integer number (434128219).

Almost surely, 2^868256437 is an apocalyptic number.

It is an amenable number.

868256437 is a deficient number, since it is larger than the sum of its proper divisors (1).

868256437 is an equidigital number, since it uses as much as digits as its factorization.

868256437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1935360, while the sum is 49.

The square root of 868256437 is about 29466.1914233923. The cubic root of 868256437 is about 954.0021143778.

The spelling of 868256437 in words is "eight hundred sixty-eight million, two hundred fifty-six thousand, four hundred thirty-seven".