65620253 has 2 divisors, whose sum is σ = 65620254. Its totient is φ = 65620252.

The previous prime is 65620249. The next prime is 65620267. The reversal of 65620253 is 35202656.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53772889 + 11847364 = 7333^2 + 3442^2 .

It is a cyclic number.

It is not a de Polignac number, because 65620253 - 2² = 65620249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65620223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32810126 + 32810127.

It is an arithmetic number, because the mean of its divisors is an integer number (32810127).

Almost surely, 2^65620253 is an apocalyptic number.

It is an amenable number.

65620253 is a deficient number, since it is larger than the sum of its proper divisors (1).

65620253 is an equidigital number, since it uses as much as digits as its factorization.

65620253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 65620253 is about 8100.6328765103. The cubic root of 65620253 is about 403.3474356262.

The spelling of 65620253 in words is "sixty-five million, six hundred twenty thousand, two hundred fifty-three".