65897129 has 2 divisors, whose sum is σ = 65897130. Its totient is φ = 65897128.

The previous prime is 65897123. The next prime is 65897191. The reversal of 65897129 is 92179856.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64080025 + 1817104 = 8005^2 + 1348^2 .

It is a cyclic number.

It is not a de Polignac number, because 65897129 - 2¹² = 65893033 is a prime.

It is a super-2 number, since 2×65897129² = 8684863220885282, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65897123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32948564 + 32948565.

It is an arithmetic number, because the mean of its divisors is an integer number (32948565).

Almost surely, 2^65897129 is an apocalyptic number.

It is an amenable number.

65897129 is a deficient number, since it is larger than the sum of its proper divisors (1).

65897129 is an equidigital number, since it uses as much as digits as its factorization.

65897129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 65897129 is about 8117.7046632653. The cubic root of 65897129 is about 403.9139300520.

The spelling of 65897129 in words is "sixty-five million, eight hundred ninety-seven thousand, one hundred twenty-nine".