84109901 has 4 divisors (see below), whose sum is σ = 86161404. Its totient is φ = 82058400.

The previous prime is 84109859. The next prime is 84109939. The reversal of 84109901 is 10990148.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46594276 + 37515625 = 6826^2 + 6125^2 .

It is a cyclic number.

It is not a de Polignac number, because 84109901 - 2¹⁴ = 84093517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84109001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025690 + ... + 1025771.

It is an arithmetic number, because the mean of its divisors is an integer number (21540351).

Almost surely, 2^84109901 is an apocalyptic number.

It is an amenable number.

84109901 is a deficient number, since it is larger than the sum of its proper divisors (2051503).

84109901 is a wasteful number, since it uses less digits than its factorization.

84109901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051502.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 84109901 is about 9171.1450212065. The cubic root of 84109901 is about 438.1428281861.

The spelling of 84109901 in words is "eighty-four million, one hundred nine thousand, nine hundred one".