65791947 has 8 divisors (see below), whose sum is σ = 94470544. Its totient is φ = 40487328.

The previous prime is 65791939. The next prime is 65791961. The reversal of 65791947 is 74919756.

It is a happy number.

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

It is not a de Polignac number, because 65791947 - 2³ = 65791939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65791896 and 65791905.

It is not an unprimeable number, because it can be changed into a prime (65791967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 843448 + ... + 843525.

It is an arithmetic number, because the mean of its divisors is an integer number (11808818).

Almost surely, 2^65791947 is an apocalyptic number.

65791947 is a deficient number, since it is larger than the sum of its proper divisors (28678597).

65791947 is a wasteful number, since it uses less digits than its factorization.

65791947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686989.

The product of its digits is 476280, while the sum is 48.

The square root of 65791947 is about 8111.2235205301. The cubic root of 65791947 is about 403.6989125966.

The spelling of 65791947 in words is "sixty-five million, seven hundred ninety-one thousand, nine hundred forty-seven".