65140169 has 2 divisors, whose sum is σ = 65140170. Its totient is φ = 65140168.

The previous prime is 65140139. The next prime is 65140171. The reversal of 65140169 is 96104156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57957769 + 7182400 = 7613^2 + 2680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65140169 is a prime.

It is a super-2 number, since 2×65140169² = 8486483234697122, which contains 22 as substring.

Together with 65140171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65140129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32570084 + 32570085.

It is an arithmetic number, because the mean of its divisors is an integer number (32570085).

Almost surely, 2^65140169 is an apocalyptic number.

It is an amenable number.

65140169 is a deficient number, since it is larger than the sum of its proper divisors (1).

65140169 is an equidigital number, since it uses as much as digits as its factorization.

65140169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 65140169 is about 8070.9459792518. The cubic root of 65140169 is about 402.3613843116.

The spelling of 65140169 in words is "sixty-five million, one hundred forty thousand, one hundred sixty-nine".