65378897 has 2 divisors, whose sum is σ = 65378898. Its totient is φ = 65378896.

The previous prime is 65378893. The next prime is 65378909. The reversal of 65378897 is 79887356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61089856 + 4289041 = 7816^2 + 2071^2 .

It is a cyclic number.

It is not a de Polignac number, because 65378897 - 2² = 65378893 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65378891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32689448 + 32689449.

It is an arithmetic number, because the mean of its divisors is an integer number (32689449).

Almost surely, 2^65378897 is an apocalyptic number.

It is an amenable number.

65378897 is a deficient number, since it is larger than the sum of its proper divisors (1).

65378897 is an equidigital number, since it uses as much as digits as its factorization.

65378897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The square root of 65378897 is about 8085.7217983307. The cubic root of 65378897 is about 402.8523144935.

The spelling of 65378897 in words is "sixty-five million, three hundred seventy-eight thousand, eight hundred ninety-seven".