65426609 has 2 divisors, whose sum is σ = 65426610. Its totient is φ = 65426608.

The previous prime is 65426593. The next prime is 65426617. The reversal of 65426609 is 90662456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64754209 + 672400 = 8047^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 65426609 - 2⁴ = 65426593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65426629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32713304 + 32713305.

It is an arithmetic number, because the mean of its divisors is an integer number (32713305).

Almost surely, 2^65426609 is an apocalyptic number.

It is an amenable number.

65426609 is a deficient number, since it is larger than the sum of its proper divisors (1).

65426609 is an equidigital number, since it uses as much as digits as its factorization.

65426609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 65426609 is about 8088.6716461975. The cubic root of 65426609 is about 402.9502880841.

The spelling of 65426609 in words is "sixty-five million, four hundred twenty-six thousand, six hundred nine".