84040043 has 4 divisors (see below), whose sum is σ = 85294440. Its totient is φ = 82785648.

The previous prime is 84040007. The next prime is 84040079. The reversal of 84040043 is 34004048.

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

It is an interprime number because it is at equal distance from previous prime (84040007) and next prime (84040079).

It is a cyclic number.

It is not a de Polignac number, because 84040043 - 2¹⁴ = 84023659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84840043) 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, 627098 + ... + 627231.

It is an arithmetic number, because the mean of its divisors is an integer number (21323610).

Almost surely, 2^84040043 is an apocalyptic number.

84040043 is a deficient number, since it is larger than the sum of its proper divisors (1254397).

84040043 is a wasteful number, since it uses less digits than its factorization.

84040043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254396.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 84040043 is about 9167.3356543764. The cubic root of 84040043 is about 438.0214938404.

The spelling of 84040043 in words is "eighty-four million, forty thousand, forty-three".