64671197 has 2 divisors, whose sum is σ = 64671198. Its totient is φ = 64671196.

The previous prime is 64671181. The next prime is 64671241. The reversal of 64671197 is 79117646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40208281 + 24462916 = 6341^2 + 4946^2 .

It is a cyclic number.

It is not a de Polignac number, because 64671197 - 2⁴ = 64671181 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64671127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32335598 + 32335599.

It is an arithmetic number, because the mean of its divisors is an integer number (32335599).

Almost surely, 2^64671197 is an apocalyptic number.

It is an amenable number.

64671197 is a deficient number, since it is larger than the sum of its proper divisors (1).

64671197 is an equidigital number, since it uses as much as digits as its factorization.

64671197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The square root of 64671197 is about 8041.8403988142. The cubic root of 64671197 is about 401.3934670701.

The spelling of 64671197 in words is "sixty-four million, six hundred seventy-one thousand, one hundred ninety-seven".