65345989 has 2 divisors, whose sum is σ = 65345990. Its totient is φ = 65345988.

The previous prime is 65345963. The next prime is 65345993. The reversal of 65345989 is 98954356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46812964 + 18533025 = 6842^2 + 4305^2 .

It is a cyclic number.

It is not a de Polignac number, because 65345989 - 2⁵ = 65345957 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 (65045989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32672994 + 32672995.

It is an arithmetic number, because the mean of its divisors is an integer number (32672995).

Almost surely, 2^65345989 is an apocalyptic number.

It is an amenable number.

65345989 is a deficient number, since it is larger than the sum of its proper divisors (1).

65345989 is an equidigital number, since it uses as much as digits as its factorization.

65345989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 49.

The square root of 65345989 is about 8083.6865970917. The cubic root of 65345989 is about 402.7847122065.

The spelling of 65345989 in words is "sixty-five million, three hundred forty-five thousand, nine hundred eighty-nine".