84774139 has 2 divisors, whose sum is σ = 84774140. Its totient is φ = 84774138.

The previous prime is 84774127. The next prime is 84774167. The reversal of 84774139 is 93147748.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84774139 - 2²¹ = 82676987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84774095 and 84774104.

It is not a weakly prime, because it can be changed into another prime (84774169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42387069 + 42387070.

It is an arithmetic number, because the mean of its divisors is an integer number (42387070).

Almost surely, 2^84774139 is an apocalyptic number.

84774139 is a deficient number, since it is larger than the sum of its proper divisors (1).

84774139 is an equidigital number, since it uses as much as digits as its factorization.

84774139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The square root of 84774139 is about 9207.2872769345. The cubic root of 84774139 is about 439.2931816312.

The spelling of 84774139 in words is "eighty-four million, seven hundred seventy-four thousand, one hundred thirty-nine".