64806487 has 4 divisors (see below), whose sum is σ = 65773816. Its totient is φ = 63839160.

The previous prime is 64806481. The next prime is 64806493. The reversal of 64806487 is 78460846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78460846 = 2 ⋅39230423.

It is an interprime number because it is at equal distance from previous prime (64806481) and next prime (64806493).

It is a cyclic number.

It is not a de Polignac number, because 64806487 - 2¹⁵ = 64773719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64806481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483564 + ... + 483697.

It is an arithmetic number, because the mean of its divisors is an integer number (16443454).

Almost surely, 2^64806487 is an apocalyptic number.

64806487 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

64806487 is a deficient number, since it is larger than the sum of its proper divisors (967329).

64806487 is an equidigital number, since it uses as much as digits as its factorization.

64806487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967328.

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 64806487 is about 8050.2476359426. The cubic root of 64806487 is about 401.6731727241.

The spelling of 64806487 in words is "sixty-four million, eight hundred six thousand, four hundred eighty-seven".