65258989 has 2 divisors, whose sum is σ = 65258990. Its totient is φ = 65258988.

The previous prime is 65258933. The next prime is 65259013. The reversal of 65258989 is 98985256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64673764 + 585225 = 8042^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 65258989 - 2¹¹ = 65256941 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65258929) 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, 32629494 + 32629495.

It is an arithmetic number, because the mean of its divisors is an integer number (32629495).

Almost surely, 2^65258989 is an apocalyptic number.

It is an amenable number.

65258989 is a deficient number, since it is larger than the sum of its proper divisors (1).

65258989 is an equidigital number, since it uses as much as digits as its factorization.

65258989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 52.

The square root of 65258989 is about 8078.3035966718. The cubic root of 65258989 is about 402.6058803533.

The spelling of 65258989 in words is "sixty-five million, two hundred fifty-eight thousand, nine hundred eighty-nine".