64698789 has 16 divisors (see below), whose sum is σ = 88653312. Its totient is φ = 41947248.

The previous prime is 64698773. The next prime is 64698791. The reversal of 64698789 is 98789646.

It is not a de Polignac number, because 64698789 - 2⁴ = 64698773 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64698769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32974 + ... + 34880.

It is an arithmetic number, because the mean of its divisors is an integer number (5540832).

Almost surely, 2^64698789 is an apocalyptic number.

It is an amenable number.

64698789 is a deficient number, since it is larger than the sum of its proper divisors (23954523).

64698789 is a wasteful number, since it uses less digits than its factorization.

64698789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216.

The product of its digits is 5225472, while the sum is 57.

The square root of 64698789 is about 8043.5557435751. Note that the first 3 decimals coincide. The cubic root of 64698789 is about 401.4505438645.

The spelling of 64698789 in words is "sixty-four million, six hundred ninety-eight thousand, seven hundred eighty-nine".