64312487 has 2 divisors, whose sum is σ = 64312488. Its totient is φ = 64312486.

The previous prime is 64312463. The next prime is 64312519. The reversal of 64312487 is 78421346.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64312487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64312187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32156243 + 32156244.

It is an arithmetic number, because the mean of its divisors is an integer number (32156244).

Almost surely, 2^64312487 is an apocalyptic number.

64312487 is a deficient number, since it is larger than the sum of its proper divisors (1).

64312487 is an equidigital number, since it uses as much as digits as its factorization.

64312487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 35.

The square root of 64312487 is about 8019.5066556491. The cubic root of 64312487 is about 400.6499578981.

The spelling of 64312487 in words is "sixty-four million, three hundred twelve thousand, four hundred eighty-seven".