65397617 has 2 divisors, whose sum is σ = 65397618. Its totient is φ = 65397616.

The previous prime is 65397613. The next prime is 65397643. The reversal of 65397617 is 71679356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48497296 + 16900321 = 6964^2 + 4111^2 .

It is a cyclic number.

It is not a de Polignac number, because 65397617 - 2² = 65397613 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65397613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32698808 + 32698809.

It is an arithmetic number, because the mean of its divisors is an integer number (32698809).

Almost surely, 2^65397617 is an apocalyptic number.

It is an amenable number.

65397617 is a deficient number, since it is larger than the sum of its proper divisors (1).

65397617 is an equidigital number, since it uses as much as digits as its factorization.

65397617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 44.

The square root of 65397617 is about 8086.8793115763. The cubic root of 65397617 is about 402.8907605161.

The spelling of 65397617 in words is "sixty-five million, three hundred ninety-seven thousand, six hundred seventeen".