65049989 has 2 divisors, whose sum is σ = 65049990. Its totient is φ = 65049988.

The previous prime is 65049983. The next prime is 65050009. The reversal of 65049989 is 98994056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57304900 + 7745089 = 7570^2 + 2783^2 .

It is a cyclic number.

It is not a de Polignac number, because 65049989 - 2²⁴ = 48272773 is a prime.

It is a super-3 number, since 3×65049989³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65049983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32524994 + 32524995.

It is an arithmetic number, because the mean of its divisors is an integer number (32524995).

Almost surely, 2^65049989 is an apocalyptic number.

It is an amenable number.

65049989 is a deficient number, since it is larger than the sum of its proper divisors (1).

65049989 is an equidigital number, since it uses as much as digits as its factorization.

65049989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 65049989 is about 8065.3573386428. The cubic root of 65049989 is about 402.1756222983.

The spelling of 65049989 in words is "sixty-five million, forty-nine thousand, nine hundred eighty-nine".