84739901 has 2 divisors, whose sum is σ = 84739902. Its totient is φ = 84739900.

The previous prime is 84739819. The next prime is 84739913. The reversal of 84739901 is 10993748.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64480900 + 20259001 = 8030^2 + 4501^2 .

It is a cyclic number.

It is not a de Polignac number, because 84739901 - 2¹⁴ = 84723517 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84739001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42369950 + 42369951.

It is an arithmetic number, because the mean of its divisors is an integer number (42369951).

Almost surely, 2^84739901 is an apocalyptic number.

It is an amenable number.

84739901 is a deficient number, since it is larger than the sum of its proper divisors (1).

84739901 is an equidigital number, since it uses as much as digits as its factorization.

84739901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 84739901 is about 9205.4278010313. The cubic root of 84739901 is about 439.2340340916.

The spelling of 84739901 in words is "eighty-four million, seven hundred thirty-nine thousand, nine hundred one".