83985947 has 8 divisors (see below), whose sum is σ = 88872960. Its totient is φ = 79145640.

The previous prime is 83985931. The next prime is 83985961. The reversal of 83985947 is 74958938.

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

It is not a de Polignac number, because 83985947 - 2⁴ = 83985931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83985977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7943 + ... + 15200.

It is an arithmetic number, because the mean of its divisors is an integer number (11109120).

Almost surely, 2^83985947 is an apocalyptic number.

83985947 is a deficient number, since it is larger than the sum of its proper divisors (4887013).

83985947 is a wasteful number, since it uses less digits than its factorization.

83985947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23353.

The product of its digits is 2177280, while the sum is 53.

The square root of 83985947 is about 9164.3847038413. The cubic root of 83985947 is about 437.9274898559.

The spelling of 83985947 in words is "eighty-three million, nine hundred eighty-five thousand, nine hundred forty-seven".