64997 has 2 divisors, whose sum is σ = 64998. Its totient is φ = 64996.

The previous prime is 64969. The next prime is 65003. The reversal of 64997 is 79946.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43681 + 21316 = 209^2 + 146^2 .

It is a cyclic number.

It is not a de Polignac number, because 64997 - 2¹² = 60901 is a prime.

It is a super-2 number, since 2×64997² = 8449220018, which contains 22 as substring.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64927) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32498 + 32499.

It is an arithmetic number, because the mean of its divisors is an integer number (32499).

2⁶⁴⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

64997 is a deficient number, since it is larger than the sum of its proper divisors (1).

64997 is an equidigital number, since it uses as much as digits as its factorization.

64997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 35.

The square root of 64997 is about 254.9450921277. The cubic root of 64997 is about 40.2066390032.

The spelling of 64997 in words is "sixty-four thousand, nine hundred ninety-seven".