65129573 has 2 divisors, whose sum is σ = 65129574. Its totient is φ = 65129572.

The previous prime is 65129557. The next prime is 65129591. The reversal of 65129573 is 37592156.

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., 63648484 + 1481089 = 7978^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 65129573 - 2⁴ = 65129557 is a prime.

It is a super-2 number, since 2×65129573² = 8483722558324658, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65129513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32564786 + 32564787.

It is an arithmetic number, because the mean of its divisors is an integer number (32564787).

Almost surely, 2^65129573 is an apocalyptic number.

It is an amenable number.

65129573 is a deficient number, since it is larger than the sum of its proper divisors (1).

65129573 is an equidigital number, since it uses as much as digits as its factorization.

65129573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 38.

The square root of 65129573 is about 8070.2895239266. The cubic root of 65129573 is about 402.3395664764.

The spelling of 65129573 in words is "sixty-five million, one hundred twenty-nine thousand, five hundred seventy-three".