84840427 has 4 divisors (see below), whose sum is σ = 96960496. Its totient is φ = 72720360.

The previous prime is 84840409. The next prime is 84840433. The reversal of 84840427 is 72404848.

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

It is a cyclic number.

It is not a de Polignac number, because 84840427 - 2¹¹ = 84838379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84040427) 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, 6060024 + ... + 6060037.

It is an arithmetic number, because the mean of its divisors is an integer number (24240124).

Almost surely, 2^84840427 is an apocalyptic number.

84840427 is a deficient number, since it is larger than the sum of its proper divisors (12120069).

84840427 is a wasteful number, since it uses less digits than its factorization.

84840427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12120068.

The product of its (nonzero) digits is 57344, while the sum is 37.

The square root of 84840427 is about 9210.8863308587. The cubic root of 84840427 is about 439.4076516024.

The spelling of 84840427 in words is "eighty-four million, eight hundred forty thousand, four hundred twenty-seven".