65132391 has 8 divisors (see below), whose sum is σ = 86909680. Its totient is φ = 43388352.

The previous prime is 65132387. The next prime is 65132407. The reversal of 65132391 is 19323156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65132391 - 2² = 65132387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65132311) 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 in 7 ways as a sum of consecutive naturals, for example, 3310 + ... + 11883.

It is an arithmetic number, because the mean of its divisors is an integer number (10863710).

Almost surely, 2^65132391 is an apocalyptic number.

65132391 is a deficient number, since it is larger than the sum of its proper divisors (21777289).

65132391 is a wasteful number, since it uses less digits than its factorization.

65132391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16625.

The product of its digits is 4860, while the sum is 30.

The square root of 65132391 is about 8070.4641130483. The cubic root of 65132391 is about 402.3453691478.

The spelling of 65132391 in words is "sixty-five million, one hundred thirty-two thousand, three hundred ninety-one".