264893821 has 2 divisors, whose sum is σ = 264893822. Its totient is φ = 264893820.

The previous prime is 264893807. The next prime is 264893843. The reversal of 264893821 is 128398462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251571321 + 13322500 = 15861^2 + 3650^2 .

It is a cyclic number.

It is not a de Polignac number, because 264893821 - 2⁵ = 264893789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264893861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132446910 + 132446911.

It is an arithmetic number, because the mean of its divisors is an integer number (132446911).

Almost surely, 2^264893821 is an apocalyptic number.

It is an amenable number.

264893821 is a deficient number, since it is larger than the sum of its proper divisors (1).

264893821 is an equidigital number, since it uses as much as digits as its factorization.

264893821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 43.

The square root of 264893821 is about 16275.5590072968. The cubic root of 264893821 is about 642.2300306636.

It can be divided in two parts, 2648 and 93821, that added together give a palindrome (96469).

The spelling of 264893821 in words is "two hundred sixty-four million, eight hundred ninety-three thousand, eight hundred twenty-one".