84147901 has 2 divisors, whose sum is σ = 84147902. Its totient is φ = 84147900.

The previous prime is 84147893. The next prime is 84147911. The reversal of 84147901 is 10974148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54007801 + 30140100 = 7349^2 + 5490^2 .

It is a cyclic number.

It is not a de Polignac number, because 84147901 - 2³ = 84147893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84147911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42073950 + 42073951.

It is an arithmetic number, because the mean of its divisors is an integer number (42073951).

Almost surely, 2^84147901 is an apocalyptic number.

It is an amenable number.

84147901 is a deficient number, since it is larger than the sum of its proper divisors (1).

84147901 is an equidigital number, since it uses as much as digits as its factorization.

84147901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 84147901 is about 9173.2165024052. The cubic root of 84147901 is about 438.2088010802.

The spelling of 84147901 in words is "eighty-four million, one hundred forty-seven thousand, nine hundred one".