64693899 has 6 divisors (see below), whose sum is σ = 93446756. Its totient is φ = 43129260.

The previous prime is 64693897. The next prime is 64693901. The reversal of 64693899 is 99839646.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64693897) and next prime (64693901).

It is not a de Polignac number, because 64693899 - 2¹ = 64693897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64693897) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3594097 + ... + 3594114.

Almost surely, 2^64693899 is an apocalyptic number.

64693899 is a deficient number, since it is larger than the sum of its proper divisors (28752857).

64693899 is a wasteful number, since it uses less digits than its factorization.

64693899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7188217 (or 7188214 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 64693899 is about 8043.2517677865. The cubic root of 64693899 is about 401.4404295967.

The spelling of 64693899 in words is "sixty-four million, six hundred ninety-three thousand, eight hundred ninety-nine".