84876709 has 2 divisors, whose sum is σ = 84876710. Its totient is φ = 84876708.

The previous prime is 84876677. The next prime is 84876761. The reversal of 84876709 is 90767848.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77827684 + 7049025 = 8822^2 + 2655^2 .

It is a cyclic number.

It is not a de Polignac number, because 84876709 - 2⁵ = 84876677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84876809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42438354 + 42438355.

It is an arithmetic number, because the mean of its divisors is an integer number (42438355).

Almost surely, 2^84876709 is an apocalyptic number.

It is an amenable number.

84876709 is a deficient number, since it is larger than the sum of its proper divisors (1).

84876709 is an equidigital number, since it uses as much as digits as its factorization.

84876709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 84876709 is about 9212.8556376403. The cubic root of 84876709 is about 439.4702802215.

The spelling of 84876709 in words is "eighty-four million, eight hundred seventy-six thousand, seven hundred nine".