64869913 has 8 divisors (see below), whose sum is σ = 69342336. Its totient is φ = 60535200.

The previous prime is 64869899. The next prime is 64869919. The reversal of 64869913 is 31996846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64869913 - 2⁵ = 64869881 is a prime.

It is a super-2 number, since 2×64869913² = 8416211225255138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64869919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33453 + ... + 35338.

It is an arithmetic number, because the mean of its divisors is an integer number (8667792).

Almost surely, 2^64869913 is an apocalyptic number.

It is an amenable number.

64869913 is a deficient number, since it is larger than the sum of its proper divisors (4472423).

64869913 is a wasteful number, since it uses less digits than its factorization.

64869913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68855.

The product of its digits is 279936, while the sum is 46.

The square root of 64869913 is about 8054.1860544688. The cubic root of 64869913 is about 401.8041689514.

The spelling of 64869913 in words is "sixty-four million, eight hundred sixty-nine thousand, nine hundred thirteen".