84040001 has 4 divisors (see below), whose sum is σ = 84059952. Its totient is φ = 84020052.

The previous prime is 84039997. The next prime is 84040007. The reversal of 84040001 is 10004048.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84040001 - 2² = 84039997 is a prime.

It is a super-3 number, since 3×84040001³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84040007) 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, 911 + ... + 12996.

It is an arithmetic number, because the mean of its divisors is an integer number (21014988).

Almost surely, 2^84040001 is an apocalyptic number.

It is an amenable number.

84040001 is a deficient number, since it is larger than the sum of its proper divisors (19951).

84040001 is a wasteful number, since it uses less digits than its factorization.

84040001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19950.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 84040001 is about 9167.3333636342. Note that the first 4 decimals coincide. The cubic root of 84040001 is about 438.0214208716.

Adding to 84040001 its reverse (10004048), we get a palindrome (94044049).

The spelling of 84040001 in words is "eighty-four million, forty thousand, one".