65489409 has 12 divisors (see below), whose sum is σ = 99574800. Its totient is φ = 41361624.

The previous prime is 65489401. The next prime is 65489419. The reversal of 65489409 is 90498456.

It is a happy number.

It is not a de Polignac number, because 65489409 - 2³ = 65489401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65489401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191319 + ... + 191660.

It is an arithmetic number, because the mean of its divisors is an integer number (8297900).

Almost surely, 2^65489409 is an apocalyptic number.

It is an amenable number.

65489409 is a deficient number, since it is larger than the sum of its proper divisors (34085391).

65489409 is a wasteful number, since it uses less digits than its factorization.

65489409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383004 (or 383001 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 65489409 is about 8092.5526875023. The cubic root of 65489409 is about 403.0791713541.

The spelling of 65489409 in words is "sixty-five million, four hundred eighty-nine thousand, four hundred nine".