264405487 has 2 divisors, whose sum is σ = 264405488. Its totient is φ = 264405486.

The previous prime is 264405481. The next prime is 264405511. The reversal of 264405487 is 784504462.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264405487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264405481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132202743 + 132202744.

It is an arithmetic number, because the mean of its divisors is an integer number (132202744).

Almost surely, 2^264405487 is an apocalyptic number.

264405487 is a deficient number, since it is larger than the sum of its proper divisors (1).

264405487 is an equidigital number, since it uses as much as digits as its factorization.

264405487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 215040, while the sum is 40.

The square root of 264405487 is about 16260.5500214476. The cubic root of 264405487 is about 641.8351357351.

The spelling of 264405487 in words is "two hundred sixty-four million, four hundred five thousand, four hundred eighty-seven".