264194387 has 2 divisors, whose sum is σ = 264194388. Its totient is φ = 264194386.

The previous prime is 264194383. The next prime is 264194401. The reversal of 264194387 is 783491462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264194387 - 2² = 264194383 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (264194383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132097193 + 132097194.

It is an arithmetic number, because the mean of its divisors is an integer number (132097194).

Almost surely, 2^264194387 is an apocalyptic number.

264194387 is a deficient number, since it is larger than the sum of its proper divisors (1).

264194387 is an equidigital number, since it uses as much as digits as its factorization.

264194387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 44.

The square root of 264194387 is about 16254.0575549615. The cubic root of 264194387 is about 641.6642776171.

The spelling of 264194387 in words is "two hundred sixty-four million, one hundred ninety-four thousand, three hundred eighty-seven".