84542369 has 4 divisors (see below), whose sum is σ = 86604420. Its totient is φ = 82480320.

The previous prime is 84542357. The next prime is 84542383. The reversal of 84542369 is 96324548.

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 28217344 + 56325025 = 5312^2 + 7505^2 .

It is a cyclic number.

It is not a de Polignac number, because 84542369 - 2¹² = 84538273 is a prime.

It is a super-2 number, since 2×84542369² = 14294824312264322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 2062009 = 84542369 / (8 + 4 + 5 + 4 + 2 + 3 + 6 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84542399) 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, 1030964 + ... + 1031045.

It is an arithmetic number, because the mean of its divisors is an integer number (21651105).

Almost surely, 2^84542369 is an apocalyptic number.

It is an amenable number.

84542369 is a deficient number, since it is larger than the sum of its proper divisors (2062051).

84542369 is a wasteful number, since it uses less digits than its factorization.

84542369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062050.

The product of its digits is 207360, while the sum is 41.

The square root of 84542369 is about 9194.6924364005. The cubic root of 84542369 is about 438.8924780303.

The spelling of 84542369 in words is "eighty-four million, five hundred forty-two thousand, three hundred sixty-nine".