264307861 has 2 divisors, whose sum is σ = 264307862. Its totient is φ = 264307860.

The previous prime is 264307859. The next prime is 264307867. The reversal of 264307861 is 168703462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190605636 + 73702225 = 13806^2 + 8585^2 .

It is a cyclic number.

It is not a de Polignac number, because 264307861 - 2¹ = 264307859 is a prime.

Together with 264307859, it forms a pair of twin primes.

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 264307861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264307867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132153930 + 132153931.

It is an arithmetic number, because the mean of its divisors is an integer number (132153931).

Almost surely, 2^264307861 is an apocalyptic number.

It is an amenable number.

264307861 is a deficient number, since it is larger than the sum of its proper divisors (1).

264307861 is an equidigital number, since it uses as much as digits as its factorization.

264307861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 264307861 is about 16257.5478163221. The cubic root of 264307861 is about 641.7561314361.

The spelling of 264307861 in words is "two hundred sixty-four million, three hundred seven thousand, eight hundred sixty-one".