83947791 has 8 divisors (see below), whose sum is σ = 112045360. Its totient is φ = 55907712.

The previous prime is 83947763. The next prime is 83947811. The reversal of 83947791 is 19774938.

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

It is not a de Polignac number, because 83947791 - 2¹⁵ = 83915023 is a prime.

It is a super-2 number, since 2×83947791² = 14094463227559362, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83947791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83947741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10840 + ... + 16893.

It is an arithmetic number, because the mean of its divisors is an integer number (14005670).

Almost surely, 2^83947791 is an apocalyptic number.

83947791 is a deficient number, since it is larger than the sum of its proper divisors (28097569).

83947791 is a wasteful number, since it uses less digits than its factorization.

83947791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28745.

The product of its digits is 381024, while the sum is 48.

The square root of 83947791 is about 9162.3027127464. The cubic root of 83947791 is about 437.8611609322.

The spelling of 83947791 in words is "eighty-three million, nine hundred forty-seven thousand, seven hundred ninety-one".