84946139 has 4 divisors (see below), whose sum is σ = 85900680. Its totient is φ = 83991600.

The previous prime is 84946111. The next prime is 84946159. The reversal of 84946139 is 93164948.

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 84946139 - 2²⁴ = 68168923 is a prime.

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 84946139.

It is not an unprimeable number, because it can be changed into a prime (84946159) 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, 477137 + ... + 477314.

It is an arithmetic number, because the mean of its divisors is an integer number (21475170).

Almost surely, 2^84946139 is an apocalyptic number.

84946139 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

84946139 is a deficient number, since it is larger than the sum of its proper divisors (954541).

84946139 is an equidigital number, since it uses as much as digits as its factorization.

84946139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954540.

The product of its digits is 186624, while the sum is 44.

The square root of 84946139 is about 9216.6229715661. The cubic root of 84946139 is about 439.5900779291.

The spelling of 84946139 in words is "eighty-four million, nine hundred forty-six thousand, one hundred thirty-nine".