83427709 has 2 divisors, whose sum is σ = 83427710. Its totient is φ = 83427708.

The previous prime is 83427703. The next prime is 83427731. The reversal of 83427709 is 90772438.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61544025 + 21883684 = 7845^2 + 4678^2 .

It is a cyclic number.

It is not a de Polignac number, because 83427709 - 2⁷ = 83427581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83427703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41713854 + 41713855.

It is an arithmetic number, because the mean of its divisors is an integer number (41713855).

Almost surely, 2^83427709 is an apocalyptic number.

It is an amenable number.

83427709 is a deficient number, since it is larger than the sum of its proper divisors (1).

83427709 is an equidigital number, since it uses as much as digits as its factorization.

83427709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 83427709 is about 9133.8769972011. The cubic root of 83427709 is about 436.9550596386.

The spelling of 83427709 in words is "eighty-three million, four hundred twenty-seven thousand, seven hundred nine".