65338491 has 4 divisors (see below), whose sum is σ = 87117992. Its totient is φ = 43558992.

The previous prime is 65338489. The next prime is 65338501. The reversal of 65338491 is 19483356.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 65338491 - 2¹ = 65338489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65338291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10889746 + ... + 10889751.

It is an arithmetic number, because the mean of its divisors is an integer number (21779498).

Almost surely, 2^65338491 is an apocalyptic number.

65338491 is a deficient number, since it is larger than the sum of its proper divisors (21779501).

65338491 is a wasteful number, since it uses less digits than its factorization.

65338491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21779500.

The product of its digits is 77760, while the sum is 39.

The square root of 65338491 is about 8083.2228102410. Note that the first 3 decimals coincide. The cubic root of 65338491 is about 402.7693060312.

The spelling of 65338491 in words is "sixty-five million, three hundred thirty-eight thousand, four hundred ninety-one".