64503487 has 4 divisors (see below), whose sum is σ = 64780560. Its totient is φ = 64226416.

The previous prime is 64503449. The next prime is 64503493. The reversal of 64503487 is 78430546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78430546 = 2 ⋅39215273.

It is a cyclic number.

It is not a de Polignac number, because 64503487 - 2¹⁵ = 64470719 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 (64503437) 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, 138187 + ... + 138652.

It is an arithmetic number, because the mean of its divisors is an integer number (16195140).

Almost surely, 2^64503487 is an apocalyptic number.

64503487 is a deficient number, since it is larger than the sum of its proper divisors (277073).

64503487 is a wasteful number, since it uses less digits than its factorization.

64503487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277072.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 64503487 is about 8031.4062903081. The cubic root of 64503487 is about 401.0461925672.

The spelling of 64503487 in words is "sixty-four million, five hundred three thousand, four hundred eighty-seven".