64063997 has 8 divisors (see below), whose sum is σ = 65592120. Its totient is φ = 62553600.

The previous prime is 64063981. The next prime is 64064051. The reversal of 64063997 is 79936046.

It can be written as a sum of positive squares in 4 ways, for example, as 42432196 + 21631801 = 6514^2 + 4651^2 .

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 64063997 - 2⁴ = 64063981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64063297) 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, 3029 + ... + 11717.

It is an arithmetic number, because the mean of its divisors is an integer number (8199015).

Almost surely, 2^64063997 is an apocalyptic number.

It is an amenable number.

64063997 is a deficient number, since it is larger than the sum of its proper divisors (1528123).

64063997 is a wasteful number, since it uses less digits than its factorization.

64063997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8863.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 64063997 is about 8003.9988130934. The cubic root of 64063997 is about 400.1332826677.

The spelling of 64063997 in words is "sixty-four million, sixty-three thousand, nine hundred ninety-seven".