264338861 has 2 divisors, whose sum is σ = 264338862. Its totient is φ = 264338860.

The previous prime is 264338813. The next prime is 264338863. The reversal of 264338861 is 168833462.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148108900 + 116229961 = 12170^2 + 10781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264338861 is a prime.

Together with 264338863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264338863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132169430 + 132169431.

It is an arithmetic number, because the mean of its divisors is an integer number (132169431).

Almost surely, 2^264338861 is an apocalyptic number.

It is an amenable number.

264338861 is a deficient number, since it is larger than the sum of its proper divisors (1).

264338861 is an equidigital number, since it uses as much as digits as its factorization.

264338861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 41.

The square root of 264338861 is about 16258.5011916843. The cubic root of 264338861 is about 641.7812204393.

The spelling of 264338861 in words is "two hundred sixty-four million, three hundred thirty-eight thousand, eight hundred sixty-one".