84039667 has 4 divisors (see below), whose sum is σ = 86750656. Its totient is φ = 81328680.

The previous prime is 84039649. The next prime is 84039689. The reversal of 84039667 is 76693048.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84039667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84039607) 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, 1355448 + ... + 1355509.

It is an arithmetic number, because the mean of its divisors is an integer number (21687664).

Almost surely, 2^84039667 is an apocalyptic number.

84039667 is a deficient number, since it is larger than the sum of its proper divisors (2710989).

84039667 is a wasteful number, since it uses less digits than its factorization.

84039667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710988.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 84039667 is about 9167.3151467592. The cubic root of 84039667 is about 438.0208405949.

The spelling of 84039667 in words is "eighty-four million, thirty-nine thousand, six hundred sixty-seven".