64487019 has 4 divisors (see below), whose sum is σ = 85982696. Its totient is φ = 42991344.

The previous prime is 64486999. The next prime is 64487029. The reversal of 64487019 is 91078446.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64487019 - 2⁹ = 64486507 is a prime.

It is a super-2 number, since 2×64487019² = 8317151239012722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64487029) 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, 10747834 + ... + 10747839.

It is an arithmetic number, because the mean of its divisors is an integer number (21495674).

Almost surely, 2^64487019 is an apocalyptic number.

64487019 is a deficient number, since it is larger than the sum of its proper divisors (21495677).

64487019 is a wasteful number, since it uses less digits than its factorization.

64487019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21495676.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 64487019 is about 8030.3809996787. The cubic root of 64487019 is about 401.0120600930.

The spelling of 64487019 in words is "sixty-four million, four hundred eighty-seven thousand, nineteen".