65046991 has 4 divisors (see below), whose sum is σ = 65093392. Its totient is φ = 65000592.

The previous prime is 65046979. The next prime is 65047007. The reversal of 65046991 is 19964056.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65046991 is a prime.

It is a super-2 number, since 2×65046991² = 8462222076308162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65046791) 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, 21030 + ... + 23923.

It is an arithmetic number, because the mean of its divisors is an integer number (16273348).

Almost surely, 2^65046991 is an apocalyptic number.

65046991 is a deficient number, since it is larger than the sum of its proper divisors (46401).

65046991 is a wasteful number, since it uses less digits than its factorization.

65046991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46400.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 65046991 is about 8065.1714798881. The cubic root of 65046991 is about 402.1694437626.

The spelling of 65046991 in words is "sixty-five million, forty-six thousand, nine hundred ninety-one".