65213969 has 2 divisors, whose sum is σ = 65213970. Its totient is φ = 65213968.

The previous prime is 65213963. The next prime is 65213971. The reversal of 65213969 is 96931256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65044225 + 169744 = 8065^2 + 412^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65213969 is a prime.

It is a super-2 number, since 2×65213969² = 8505723505465922, which contains 22 as substring.

Together with 65213971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65213963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32606984 + 32606985.

It is an arithmetic number, because the mean of its divisors is an integer number (32606985).

Almost surely, 2^65213969 is an apocalyptic number.

It is an amenable number.

65213969 is a deficient number, since it is larger than the sum of its proper divisors (1).

65213969 is an equidigital number, since it uses as much as digits as its factorization.

65213969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 41.

The square root of 65213969 is about 8075.5166398194. The cubic root of 65213969 is about 402.5132775991.

The spelling of 65213969 in words is "sixty-five million, two hundred thirteen thousand, nine hundred sixty-nine".