64729898 has 8 divisors (see below), whose sum is σ = 99463140. Its totient is φ = 31575520.

The previous prime is 64729883. The next prime is 64729927. The reversal of 64729898 is 89892746.

It can be written as a sum of positive squares in 2 ways, for example, as 60637369 + 4092529 = 7787^2 + 2023^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394613 + ... + 394776.

Almost surely, 2^64729898 is an apocalyptic number.

64729898 is a deficient number, since it is larger than the sum of its proper divisors (34733242).

64729898 is a wasteful number, since it uses less digits than its factorization.

64729898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789432.

The product of its digits is 1741824, while the sum is 53.

The square root of 64729898 is about 8045.4892952511. The cubic root of 64729898 is about 401.5148764640.

The spelling of 64729898 in words is "sixty-four million, seven hundred twenty-nine thousand, eight hundred ninety-eight".