65418019 has 2 divisors, whose sum is σ = 65418020. Its totient is φ = 65418018.

The previous prime is 65418013. The next prime is 65418037. The reversal of 65418019 is 91081456.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65418019 is a prime.

It is a super-2 number, since 2×65418019² = 8559034419768722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65418013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32709009 + 32709010.

It is an arithmetic number, because the mean of its divisors is an integer number (32709010).

Almost surely, 2^65418019 is an apocalyptic number.

65418019 is a deficient number, since it is larger than the sum of its proper divisors (1).

65418019 is an equidigital number, since it uses as much as digits as its factorization.

65418019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 65418019 is about 8088.1406392322. The cubic root of 65418019 is about 402.9326525761.

The spelling of 65418019 in words is "sixty-five million, four hundred eighteen thousand, nineteen".