84351109 has 2 divisors, whose sum is σ = 84351110. Its totient is φ = 84351108.

The previous prime is 84351101. The next prime is 84351119. The reversal of 84351109 is 90115348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72080100 + 12271009 = 8490^2 + 3503^2 .

It is a cyclic number.

It is not a de Polignac number, because 84351109 - 2³ = 84351101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84351101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42175554 + 42175555.

It is an arithmetic number, because the mean of its divisors is an integer number (42175555).

Almost surely, 2^84351109 is an apocalyptic number.

It is an amenable number.

84351109 is a deficient number, since it is larger than the sum of its proper divisors (1).

84351109 is an equidigital number, since it uses as much as digits as its factorization.

84351109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 84351109 is about 9184.2859820456. The cubic root of 84351109 is about 438.5612596639.

The spelling of 84351109 in words is "eighty-four million, three hundred fifty-one thousand, one hundred nine".