264121619 has 2 divisors, whose sum is σ = 264121620. Its totient is φ = 264121618.

The previous prime is 264121601. The next prime is 264121681. The reversal of 264121619 is 916121462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264121619 - 2¹² = 264117523 is a prime.

It is a super-2 number, since 2×264121619² = 139520459246362322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (264121019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132060809 + 132060810.

It is an arithmetic number, because the mean of its divisors is an integer number (132060810).

Almost surely, 2^264121619 is an apocalyptic number.

264121619 is a deficient number, since it is larger than the sum of its proper divisors (1).

264121619 is an equidigital number, since it uses as much as digits as its factorization.

264121619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 264121619 is about 16251.8189443520. The cubic root of 264121619 is about 641.6053602492.

The spelling of 264121619 in words is "two hundred sixty-four million, one hundred twenty-one thousand, six hundred nineteen".