64971197 has 2 divisors, whose sum is σ = 64971198. Its totient is φ = 64971196.

The previous prime is 64971187. The next prime is 64971209. The reversal of 64971197 is 79117946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64947481 + 23716 = 8059^2 + 154^2 .

It is a cyclic number.

It is not a de Polignac number, because 64971197 - 2¹⁰ = 64970173 is a prime.

It is a super-2 number, since 2×64971197² = 8442512879225618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64971167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32485598 + 32485599.

It is an arithmetic number, because the mean of its divisors is an integer number (32485599).

Almost surely, 2^64971197 is an apocalyptic number.

It is an amenable number.

64971197 is a deficient number, since it is larger than the sum of its proper divisors (1).

64971197 is an equidigital number, since it uses as much as digits as its factorization.

64971197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 44.

The square root of 64971197 is about 8060.4712641383. The cubic root of 64971197 is about 402.0131778722.

The spelling of 64971197 in words is "sixty-four million, nine hundred seventy-one thousand, one hundred ninety-seven".