65440253 has 2 divisors, whose sum is σ = 65440254. Its totient is φ = 65440252.

The previous prime is 65440247. The next prime is 65440283. The reversal of 65440253 is 35204456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55026724 + 10413529 = 7418^2 + 3227^2 .

It is a cyclic number.

It is not a de Polignac number, because 65440253 - 2⁶ = 65440189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65440283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32720126 + 32720127.

It is an arithmetic number, because the mean of its divisors is an integer number (32720127).

Almost surely, 2^65440253 is an apocalyptic number.

It is an amenable number.

65440253 is a deficient number, since it is larger than the sum of its proper divisors (1).

65440253 is an equidigital number, since it uses as much as digits as its factorization.

65440253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 65440253 is about 8089.5150040036. The cubic root of 65440253 is about 402.9782964214.

The spelling of 65440253 in words is "sixty-five million, four hundred forty thousand, two hundred fifty-three".