65082991 has 4 divisors (see below), whose sum is σ = 65171800. Its totient is φ = 64994184.

The previous prime is 65082971. The next prime is 65083001. The reversal of 65082991 is 19928056.

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

It is a cyclic number.

It is not a de Polignac number, because 65082991 - 2⁷ = 65082863 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 (65082911) 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, 43296 + ... + 44773.

It is an arithmetic number, because the mean of its divisors is an integer number (16292950).

Almost surely, 2^65082991 is an apocalyptic number.

65082991 is a deficient number, since it is larger than the sum of its proper divisors (88809).

65082991 is an equidigital number, since it uses as much as digits as its factorization.

65082991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88808.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 65082991 is about 8067.4029898103. The cubic root of 65082991 is about 402.2436231091.

The spelling of 65082991 in words is "sixty-five million, eighty-two thousand, nine hundred ninety-one".